阅读说明：本技术 一种用于竖井掘进中模块化混凝土护壁结构 (Modular concrete dado structure used in shaft tunneling ) 是由 瞿波 余讯 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种用于竖井掘进中模块化混凝土护壁结构,包括依次叠放连接形成竖井空间的多个竖井空间单元节,竖井空间单元节包括采用混凝土制成预制件的护壁片一、护壁片二及护壁片三,护壁片一、护壁片二及护壁片三左右两侧依次首尾连接,护壁片一及护壁片二底部设置有榫卯结构母头,顶部设置有与榫卯结构母头匹配的榫卯结构公头,护壁片一与护壁片二之间、护壁片一与护壁片三之间及护壁片二与护壁片三之间均通过连接扣件连接,护壁片一、护壁片二及护壁片三上均设置有护壁片抓取螺纹口。本申请可以减少浇混凝土捆扎钢筋笼、支模具、浇筑混凝土及混凝土凝固的时间,大大地提高生产的效率。(The invention discloses a modular concrete dado structure used in shaft excavation, which comprises a plurality of shaft space unit sections which are sequentially stacked and connected to form a shaft space, wherein the shaft space unit sections comprise a dado sheet I, a dado sheet II and a dado sheet III which are made of concrete into prefabricated members, the left side and the right side of the dado sheet I, the dado sheet II and the dado sheet III are sequentially connected end to end, tenon-and-mortise structure female heads are arranged at the bottoms of the dado sheet I and the dado sheet II, tenon-and-mortise structure male heads matched with the tenon-and-mortise structure female heads are arranged at the tops of the dado sheet I and the dado sheet II, the dado sheet I and the dado sheet III are connected through connecting fasteners, and dado sheet I, the dado sheet II and the dado sheet III are all provided with dado sheet grabbing threaded openings. This application can reduce the time that pouring concrete tied up steel reinforcement cage, a mould, concreting and concrete set, improves the efficiency of production widely.)

1. The utility model provides a modular concrete dado structure for in shaft tunnelling, stacks a plurality of shaft space unit sections that connect formation shaft space in proper order, its characterized in that: shaft space unit section is including adopting the concrete to make dado piece (1), dado piece two (2) and dado piece three (3) of prefab, dado piece (1), dado piece two (2) and the left and right sides of dado piece three (3) end to end connection in proper order, dado piece one (1) and dado piece two (2) bottom are provided with female head (4) of mortise and tenon joint structure, the top be provided with the public head (5) of mortise and tenon joint structure that the female head (4) of mortise and tenon joint structure matches, between dado piece one (1) and dado piece two (2), between dado piece one (1) and dado piece three (3) and between dado piece two (2) and dado piece three (3) all be connected through connecting fastener, dado piece one (1), dado piece two (2) and snatch on the dado piece three (3) all be provided with dado piece screw thread mouth (6).

2. The modular concrete retaining wall structure for shaft tunnelling as claimed in claim 1, wherein: the female head (4) of the mortise and tenon joint structure comprises a connecting piece shell (7), a sliding tongue (8) arranged inside the connecting piece shell (7) in a matching mode, and a compression spring (9) connected to the sliding tongue (8).

3. The modular concrete retaining wall structure for shaft tunnelling as claimed in claim 1, wherein: the tenon-and-mortise structure male head (5) is of a tenon structure, the bottom end of the tenon structure is of a columnar structure, the top end of the tenon structure is of a round platform structure, and the side edge of the round platform structure is of a chamfering structure.

4. The modular concrete retaining wall structure for shaft tunnelling as claimed in claim 1, wherein: the connecting fastener comprises a butt joint groove (10) which is arranged on the left side of the first wall protection sheet (1) and on the left side and the right side of the second wall protection sheet (2), and a butt joint lug (11) which is arranged on the right side of the first wall protection sheet (1) and on the left side and the right side of the third wall protection sheet (3).

5. The modular concrete retaining wall structure for shaft tunnelling as claimed in claim 1, wherein: the butt joint groove (10) is communicated with the top of the first wall protection sheet (1) and the top of the second wall protection sheet (2).

6. The modular concrete retaining wall structure for shaft tunnelling as claimed in claim 1, wherein: the front view of the three (3) wall-protecting sheets is a trapezoidal structure with a wide upper part and a narrow lower part.

7. The modular concrete retaining wall structure for shaft tunnelling as claimed in claim 6, wherein: the trapezoid is an isosceles trapezoid.

Technical Field

The invention relates to the technical field of application of shaft excavation retaining walls, in particular to a modular concrete retaining wall structure suitable for shaft excavation.

Background

In the process of digging the hole pile, no matter the hole pile is round or square, the retaining wall is required to be used for supporting and reinforcing the stratum, and the stratum is prevented from moving to a hole in the digging direction under the action of ground stress, so that the rock wall is prevented from collapsing, and the hole pile is buried or the people and mechanical equipment working at the bottom of a well are threatened.

The retaining wall has various modes, and when the rotary excavator is used for excavating the hole pile, a circular steel retaining cylinder is adopted as the retaining wall of the hole pile; when the impact pile is formed, the slurry protecting wall is adopted; when the pile is dug manually, a cast-in-situ reinforced concrete retaining wall is adopted.

When cast-in-place reinforced concrete is used as a retaining wall, firstly a reinforcement cage is bound at a poured part, then a steel formwork is used for enclosing the shape of the retaining wall, concrete is poured between the steel formwork and a stratum, and a vibrating rod is used for compacting the concrete. After the concrete is maintained for 24 hours, the formwork can be removed only when the concrete reaches a certain strength, and the next working cycle is started on the working surface.

The cast-in-place retaining wall is limited by the concrete curing time, and the timeliness of the working cycle is restricted. The quality of the cast-in-place retaining wall depends on the experience and responsibility of workers, and the retaining wall is cracked due to short maintenance time, insufficient concrete compaction and the like. When the hole pile excavates the groundwater layer, the groundwater causes concrete mortar to run off, and the volume of the existing pouring dado is more ensured.

Disclosure of Invention

The invention aims to provide a modular concrete retaining wall structure for shaft excavation, which is convenient for ensuring that the shaft retaining wall is firmer, quicker to install and better in quality.

In order to solve the technical problem, the scheme of the invention is as follows:

the utility model provides a modularization concrete dado structure for in shaft tunnelling, includes a plurality of shaft space unit festival that stack in proper order and connect formation shaft space, shaft space unit festival is including dado piece one, dado piece two and the dado piece three that adopt the concrete to make the prefab, dado piece one, dado piece two and the three left and right sides of dado piece end to end connection in proper order, dado piece one and dado piece two bottoms are provided with mortise and tenon joint structure female head, the top be provided with the male head of mortise and tenon joint structure that the female head of mortise and tenon joint structure matches, between dado piece one and dado piece two, between dado piece one and dado piece three and between dado piece two and the dado piece three all be connected through connecting fastener, dado piece one, dado piece two and dado piece three are gone up and all are provided with the dado piece and snatch the screw thread mouth.

The female head of the mortise and tenon joint structure comprises a connecting piece shell, a sliding tongue and a compression spring, wherein the sliding tongue is arranged in the connecting piece shell in a matching mode, and the compression spring is connected to the sliding tongue.

The tenon-and-mortise structure male joint is of a tenon structure, the bottom end of the tenon structure is of a columnar structure, the top end of the tenon structure is of a round platform structure, and the side edge of the round platform structure is of a chamfer angle structure.

The connecting fastener comprises a butt joint groove arranged on the left side of the first wall protection sheet and the left and right sides of the second wall protection sheet, and a butt joint lug arranged on the right side of the first wall protection sheet and the left and right sides of the third wall protection sheet.

The butt joint groove is communicated with the top of the first wall protection sheet and the top of the second wall protection sheet.

The three front views of the wall protection sheet are in a trapezoidal structure with a wide upper part and a narrow lower part.

The trapezoid is an isosceles trapezoid.

Compared with the prior art, the invention has the beneficial effects that:

this application adopts the prefabricated reinforced concrete part of modularization as the dado of hole stake, and tying up of steel reinforcement cage, concrete placement and maintenance all go on subaerially, can realize batch production mass production, and the maintenance time is longer, and the quality obtains the guarantee more easily. Meanwhile, the prefabricated parts can reduce the time for binding the reinforcement cage with the cast concrete, supporting the mold, pouring the concrete and solidifying the concrete, thereby greatly improving the production efficiency.

After the prefabricated modular reinforced concrete part is adopted for protecting the wall, the gap between the protecting wall and the rock stratum also needs to be filled with partial concrete, but the using amount is small, and when the concrete is filled, a proper amount of quick-setting agent is added into the concrete, so that the condition of the next construction can be achieved after two hours.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a first wall protecting sheet of the present invention;

FIG. 3 is a schematic structural view of a second wall protecting sheet of the present invention;

FIG. 4 is a schematic structural view of a third wall protecting sheet of the present invention;

FIG. 5 is a front view of the present invention;

FIG. 6 is a side view of either a first wall panel or a second wall panel of the present invention;

FIG. 7 is a front view of a third wall covering panel of the present invention;

FIG. 8 is a sectional view of the female head of the mortise and tenon joint structure according to the present invention;

fig. 9 is a front view of the male head of the mortise and tenon structure of the invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 9, a modular concrete dado structure for shaft excavation comprises a plurality of shaft space unit sections which are sequentially stacked and connected to form a shaft space, the shaft space unit section comprises a first wall protection sheet 1, a second wall protection sheet 2 and a third wall protection sheet 3 which are made of concrete, the left sides and the right sides of the first wall protecting sheet 1, the second wall protecting sheet 2 and the third wall protecting sheet 3 are sequentially connected end to end, the bottoms of the first wall protecting sheet 1 and the second wall protecting sheet 2 are provided with a mortise and tenon structure female head 4, the top is provided with a mortise and tenon structure male head 5 matched with the mortise and tenon structure female head 4, the first wall protection sheet 1 and the second wall protection sheet 2, the first wall protection sheet 1 and the third wall protection sheet 3 and the second wall protection sheet 2 and the third wall protection sheet 3 are connected through connecting fasteners, and the wall protection piece I1, the wall protection piece II 2 and the wall protection piece III 3 are respectively provided with a wall protection piece grabbing threaded opening 6.

The female head 4 of the mortise and tenon joint structure comprises a connecting piece shell 7, a sliding tongue 8 and a compression spring 9, wherein the sliding tongue 8 is arranged inside the connecting piece shell 7 in a matched mode, and the compression spring 9 is connected to the sliding tongue 8.

The tenon-and-mortise structure male head 5 is of a tenon structure, the bottom end of the tenon structure is of a columnar structure, the top end of the tenon structure is of a round platform structure, and the side edge of the round platform structure is of a chamfer angle structure.

The working principle of the tenon-and-mortise structure is that the male head 5 of the tenon-and-mortise structure is inserted from the middle hole of the connecting piece shell 7, and under the action of the conical guide surface, the sliding tongue 8 presses the compression spring 9 downwards to the lower space to make the space for descending the male head 5 of the tenon-and-mortise structure.

After the male head 5 of the mortise and tenon joint structure completely enters the female head 4 of the mortise and tenon joint structure, the sliding tongue 8 moves upwards under the action of the compression spring 9 to block the tenon head, the male head 5 of the mortise and tenon joint structure is prevented from falling off under the action of the conical surface, the assembly of the mortise and tenon joint is completed, and the connection of the space unit sections of the vertical shaft is realized.

The connecting fastener comprises a butt joint groove 10 which is arranged on the left side of the first wall protection sheet 1 and on the left side and the right side of the second wall protection sheet 2, and butt joint convex blocks 11 which are arranged on the right side of the first wall protection sheet 1 and on the left side and the right side of the third wall protection sheet 3. The arrangement is mainly to ensure the tight connection among the first protective wall sheet 1, the second protective wall sheet 2 and the third protective wall sheet 3.

The butt joint groove 10 is communicated with the top of the first wall protection sheet 1 and the top of the second wall protection sheet 2. The connection assembly among the first wall protection sheet 1, the second wall protection sheet 2 and the third wall protection sheet 3 is even convenient.

The front view of the three wall protection sheets 3 is a trapezoidal structure with a wide upper part and a narrow lower part. The arrangement is mainly used for ensuring that the first protective wall sheet 1, the second protective wall sheet 2 and the third protective wall sheet 3 can be clamped tightly, and the connection tightness is ensured.

The trapezoid is an isosceles trapezoid. The isosceles trapezoid structure enables the connection clamping connection among the first wall protection sheet 1, the second wall protection sheet 2 and the third wall protection sheet 3 to be tighter.

In the actual production process: the production work flow of the prefabricated part is as follows: determining the type of a retaining wall, manufacturing a reinforcement cage, supporting a mold, embedding a mortise and tenon structure female head 4 and a mortise and tenon structure male head 5, pouring concrete, removing the mold and maintaining in a water pool;

assembling the shaft space unit section work flow: transferring a retaining wall, lowering the retaining wall to an installation position, grabbing the retaining wall through a retaining wall piece grabbing threaded hole 6 by matching a mechanical arm, adjusting the direction of the retaining wall, butting a female head 4 of the tenon-and-mortise structure and a male head 5 of the tenon-and-mortise structure on the retaining wall, pouring concrete and finishing;

the integral protecting wall is composed of three prefabricated parts, namely a protecting wall sheet I1, a protecting wall sheet II 2 and a protecting wall sheet III 3, two large parts (the protecting wall sheet I1 and the protecting wall sheet II 2) with the angle smaller than 180 degrees and a small wedge-shaped part (the protecting wall sheet III 3) are assembled into an integral circle;

the wall protectors on the upper parts and the lower parts of the protective walls of the space unit sections of the two adjacent vertical shafts are staggered by 60 degrees, the joints of the prefabricated parts are not overlapped after assembly to form a spiral line, and the protective walls assembled by six blocks complete one cycle;

after the small wedge-shaped retaining wall is assembled, a small notch (namely a butt joint groove 10) is reserved at the upper part and is used as a channel for pouring concrete;

the upper shaft space unit section and the lower shaft space unit section of the retaining wall prefabricated member are connected through a mortise and tenon structure, and two retaining wall piece grabbing threaded openings 6 are reserved on two sides of the gravity center position on the prefabricated member and are used as mechanical arm grabbing connecting openings;

a rubber sealing piece interface groove is reserved at a butt joint part between shaft space unit sections of the prefabricated retaining wall and is used for sealing underground water in an area with abundant underground water;

the mounting sequence of the wall protecting sheets is as follows: the installation wall protection sheet I1, the installation wall protection sheet II 2 and the installation wall protection sheet III 3.

This application adopts the prefabricated reinforced concrete part of modularization as the dado of hole stake, and tying up of steel reinforcement cage, concrete placement and maintenance all go on subaerially, can realize batch production mass production, and the maintenance time is longer, and the quality obtains the guarantee more easily. Meanwhile, the prefabricated parts can reduce the time for binding the reinforcement cage with the cast concrete, supporting the mold, pouring the concrete and solidifying the concrete, thereby greatly improving the production efficiency.

After the prefabricated modular reinforced concrete part is adopted for protecting the wall, the gap between the protecting wall and the rock stratum also needs to be filled with partial concrete, but the using amount is small, and when the concrete is filled, a proper amount of quick-setting agent is added into the concrete, so that the condition of the next construction can be achieved after two hours.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.