阅读说明：本技术 Tbm石渣就地洞内利用的方法及装置 (Method and device for in-situ utilization of TBM stone slag in underground cave ) 是由 秦鹏翔 聂建国 金峰 周俊波 李超毅 潘长城 樊健生 周虎 于 2021-07-22 设计创作，主要内容包括：本申请公开了一种TBM石渣就地洞内利用的方法及装置,其中,方法包括：采集TBM开挖时的石渣,筛分出大于预设粒径的石渣,存储于洞内料仓中的同时,将剩余的石渣运出洞外；在开挖掘进过程中,同步在TBM的主机后方安装衬砌模板,并采用石料输送机将料仓中的石渣回填至围岩与衬砌模板之间的空隙,形成对围岩进行支承的块石骨架；将剩余的石渣按照粒径筛分为粗骨料、细骨料与石粉掺合料,以作为混凝土原材料配置洞渣自密实混凝土,并将洞渣自密实混凝土泵送至已有的块石骨架的衬砌空间内,形成堆石混凝土结构的隧洞衬砌。本申请实施例的方法可以有效就地洞内利用石渣,达到隧道工程的安全、环保、经济、优质的隧洞衬砌施工的目的。(The application discloses a method and a device for utilizing TBM stone slag in situ, wherein the method comprises the following steps: collecting rock ballast when the TBM is excavated, screening the rock ballast with the particle size larger than a preset particle size, storing the rock ballast in a storage bin in the tunnel, and transporting the residual rock ballast out of the tunnel; in the excavation and tunneling process, a lining template is synchronously installed behind a main machine of the TBM, and a stone conveyor is adopted to backfill the stone ballast in the storage bin to a gap between the surrounding rock and the lining template, so that a rock block framework for supporting the surrounding rock is formed; and screening the residual stone slag into coarse aggregate, fine aggregate and stone powder admixture according to the particle size, taking the admixture as a concrete raw material to prepare the hole slag self-compacting concrete, and pumping the hole slag self-compacting concrete into the lining space of the existing rock block framework to form the tunnel lining of the rockfill concrete structure. The method provided by the embodiment of the application can effectively utilize the rock ballast in the tunnel, and the aim of safe, environment-friendly, economic and high-quality tunnel lining construction of tunnel engineering is fulfilled.)

1. A method for utilizing TBM stone slag in situ is characterized by comprising the following steps:

collecting rock ballast when a full-face hard rock tunnel boring machine TBM (tunnel boring machine) excavates, screening the rock ballast with the particle size larger than a preset particle size, storing the rock ballast with the particle size larger than the preset particle size in a storage bin in a tunnel, and conveying the rest of the rock ballast out of the tunnel;

in the excavation and tunneling process, a lining template is synchronously installed behind a main machine of the TBM, and a stone conveyor is adopted to backfill the stone ballast in the storage bin to a gap between the surrounding rock and the lining template, so that a rock block framework for supporting the surrounding rock is formed; and

and screening the residual stone slag into coarse aggregate, fine aggregate and stone powder admixture according to the particle size, taking the admixture as a concrete raw material to prepare the hole slag self-compacting concrete, and pumping the hole slag self-compacting concrete into the lining space of the existing rock block framework to form the tunnel lining of the rockfill concrete structure.

2. The method of claim 1, wherein the backfilling of ballast in the bunker with the mining stone conveyor to a void between the surrounding rock and the lining form comprises:

backfilling the stone ballast in the storage bin to a gap between the surrounding rock and the lining template through a backfilling hole reserved in the lining template;

or backfilling the stone ballast in the storage bin to a gap between the surrounding rock and the lining template through a backfilling pipe reserved on a tail shield of the TBM.

3. The method of claim 2, wherein the backfill holes or tubes are located at a position of the tunnel crown slightly offset from vertical by a preset distance.

4. The method of claim 1, wherein pumping the cave slag self-compacting concrete into a lining space of an existing block stone framework comprises:

completing the self-compacting concrete of the tunnel slag in the supporting equipment behind the TBM in the tunnel, and pumping the self-compacting concrete of the tunnel slag into the lining space;

or, the mixing plant outside the tunnel completes the self-compacting concrete of the tunnel slag, and the self-compacting concrete of the tunnel slag is conveyed into the tunnel through the storage bin and is pumped into the lining space.

5. The method of claim 1, wherein the predetermined particle size is less than or equal to a gap width between the surrounding rock and the lining form and greater than or equal to 25 mm.

6. The method of claim 1, wherein the lining form is any one of a steel pipe segment, a concrete pipe segment, and a concrete supporting form.

7. The method of claim 1, wherein the stone conveyor comprises a screw conveyor and a belt conveyor.

8. A device that TBM slabstone utilized in-place hole, its characterized in that includes:

the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring the ballast when the full-face hard rock tunnel boring machine TBM (tunnel boring machine) excavates, screening the ballast with the particle size larger than a preset particle size, and transporting the rest ballast out of a tunnel while storing the ballast with the particle size larger than the preset particle size in a storage bin in the tunnel;

the backfill module is used for synchronously installing a lining template behind a main machine of the TBM in the excavation and tunneling process, and backfilling the stone ballast in the storage bin to a gap between the surrounding rock and the lining template by using a stone conveyor to form a rock block framework for supporting the surrounding rock; and

and the pumping module is used for screening the residual stone slag into a coarse aggregate, a fine aggregate and a stone powder admixture according to the particle size, taking the mixture as a concrete raw material to prepare the hole slag self-compacting concrete, and pumping the hole slag self-compacting concrete into the lining space of the existing block stone framework to form the tunnel lining of the rockfill concrete structure.

9. The utility model provides a full face hard rock tunnel boring machine which characterized in that includes: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the method of in-situ utilization of TBM ballast as claimed in any one of claims 1 to 7.

10. A computer readable storage medium having stored thereon a computer program, the program being executable by a processor for implementing a method of in-situ utilization of TBM ballast in a hole as claimed in any one of claims 1 to 7.

Technical Field

The application relates to the technical field of tunnel supporting and lining construction, in particular to a method and a device for utilizing TBM rock ballast in situ.

Background

At present, a TBM (Tunnel Boring Machine) has the advantages of high Boring speed, high safety, strong engineering geological adaptability and the like, and is widely applied to the engineering fields of roads, railways, hydraulic tunnels and the like. Taking the double-shield TBM with the highest safety as an example, after tunneling and excavation, a method of segment annular lining is generally adopted for supporting tunnel surrounding rocks, and the specific method is as follows: firstly, annular assembling of the duct piece is completed in the TBM tail shield, then the duct piece is pushed out of the tail shield, pea gravel is timely backfilled into a cavity between the duct piece and surrounding rock, and cement slurry is injected through a duct piece grouting hole to form a duct piece-gelled pea gravel-surrounding rock combined supporting structure.

In the related art, according to the field engineering practice, the construction method of pea gravel backfill-cement slurry pouring has the following defects:

(1) the pea gravel filled in the cavity of the surrounding rock and the duct piece has weaker supporting capacity, the surrounding rock and the duct piece can be greatly deformed or settled at the earlier stage, and TBM blocking is easy to occur;

(2) because the piling clearance of the bean gravel is very small, the injection compactness of the cement paste is not high, a large amount of treatment and repair work is needed in the later period, the engineering investment is increased, and the operation of the engineering is delayed;

(3) the gravel-gravel hydraulic filling and cement slurry filling both need larger backfill pressure, and the high-pressure pipeline is directly exposed in the operation space inside the shield, so that once a pipe explosion accident occurs, the safety of construction personnel is greatly threatened;

(4) the backfilling needs to purchase or process the soybean gravel additionally, a large amount of cement is consumed, and the cost is high;

(5) a large amount of cement is consumed and the hole slag is piled outside the hole, which is not favorable for the ecological environmental protection requirement.

Therefore, based on the above situation, it is necessary to provide a safe, environment-friendly, economical and high-quality tunnel lining construction method suitable for TBM tunnel engineering.

Content of application

The application provides a method and a device for utilizing TBM stone slag in situ, which aim to solve the problem that the related technology can not achieve the purpose of safe, environment-friendly, economic and high-quality tunnel lining construction of tunnel engineering.

The embodiment of the first aspect of the application provides a method for utilizing TBM stone slag in situ, which comprises the following steps: collecting rock ballast when a full-face hard rock tunnel boring machine TBM (tunnel boring machine) excavates, screening the rock ballast with the particle size larger than a preset particle size, storing the rock ballast with the particle size larger than the preset particle size in a storage bin in a tunnel, and conveying the rest of the rock ballast out of the tunnel; in the excavation and tunneling process, a lining template is synchronously installed behind a main machine of the TBM, and a stone conveyor is adopted to backfill the stone ballast in the storage bin to a gap between the surrounding rock and the lining template, so that a rock block framework for supporting the surrounding rock is formed; and screening the residual stone slag into coarse aggregate, fine aggregate and stone powder admixture according to the particle size, taking the admixture as a concrete raw material to prepare the hole slag self-compacting concrete, and pumping the hole slag self-compacting concrete into the lining space of the existing rock block framework to form the tunnel lining of the rockfill concrete structure.

Optionally, in an embodiment of the present application, the backfilling the ballast in the bunker with a stone conveyor to a gap between the surrounding rock and the lining form includes: backfilling the stone ballast in the storage bin to a gap between the surrounding rock and the lining template through a backfilling hole reserved in the lining template; or backfilling the stone ballast in the storage bin to a gap between the surrounding rock and the lining template through a backfilling pipe reserved on a tail shield of the TBM.

Optionally, in one embodiment of the present application, the backfill holes or tubes are located at a position of the tunnel crown slightly offset from vertical by a predetermined distance.

Optionally, in an embodiment of the present application, pumping the hole-slag self-compacting concrete into a lining space of an existing stone block skeleton includes: completing the self-compacting concrete of the tunnel slag in the supporting equipment behind the TBM in the tunnel, and pumping the self-compacting concrete of the tunnel slag into the lining space; or, the mixing plant outside the tunnel completes the self-compacting concrete of the tunnel slag, and the self-compacting concrete of the tunnel slag is conveyed into the tunnel through the storage bin and is pumped into the lining space.

Optionally, in an embodiment of the present application, the predetermined grain size is less than or equal to a gap width between the surrounding rock and the lining form, and is greater than or equal to 25 mm.

Optionally, in an embodiment of the present application, the lining form is any one of a steel pipe segment, a concrete pipe segment, and a concrete supporting form.

Optionally, in one embodiment of the present application, the stone conveyor comprises a screw conveyor and a belt conveyor.

The embodiment of the second aspect of this application provides a device that utilizes in place of ground hole of TBM slabstone, includes: the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring the ballast when the full-face hard rock tunnel boring machine TBM (tunnel boring machine) excavates, screening the ballast with the particle size larger than a preset particle size, and transporting the rest ballast out of a tunnel while storing the ballast with the particle size larger than the preset particle size in a storage bin in the tunnel; the backfill module is used for synchronously installing a lining template behind a main machine of the TBM in the excavation and tunneling process, and backfilling the stone ballast in the storage bin to a gap between the surrounding rock and the lining template by using a stone conveyor to form a rock block framework for supporting the surrounding rock; and the pumping module is used for screening the residual stone slag into a coarse aggregate, a fine aggregate and a stone powder admixture according to the particle size, taking the mixture as a concrete raw material to prepare the hole slag self-compacting concrete, and pumping the hole slag self-compacting concrete into the lining space of the existing block stone framework to form the tunnel lining of the rockfill concrete structure.

An embodiment of a third aspect of the present application provides a full face hard rock tunnel boring machine, including: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the method for utilizing the TBM ballast in the ground hole.

A fourth aspect of the present application provides a computer readable storage medium having a computer program stored thereon, wherein the program is executed by a processor to implement the method for in-situ utilization of TBM ballast as described in the previous embodiment.

Firstly, screening and collecting TBM excavation rock ballast, secondly, installing a lining template and backfilling large rock ballast, and finally, configuring and backfilling self-compacting concrete of the rock ballast, wherein the step of screening and collecting the excavation rock ballast comprises the steps of screening large rock ballast with more than a certain particle size in a tunneling process, storing the screened large rock ballast in a rock storage bin on a small train in a tunnel, and transporting the screened small rock ballast and rock powder to the rear; mounting a lining template in a TBM (tunnel boring machine), and then backfilling the large stone slag to a gap between surrounding rock and the lining template by using a stone conveyor to form a stone skeleton; the method comprises the steps of configuring and backfilling the hole slag self-compacting concrete, wherein small stone slag is firstly screened into coarse aggregate, fine aggregate and stone powder admixture according to particle size at the rear, then the obtained raw material is utilized to configure the hole slag self-compacting concrete, finally the configured self-compacting concrete is backfilled to the lining space of the existing stone skeleton, gaps among the stone skeleton are filled in a self-compacting mode through the super-flowability of the self-compacting concrete, a lining of a rockfill concrete structure is formed, the advantages of the rockfill concrete structure are fully exerted, after excavation, the TBM stone slag is directly placed in a warehouse through simple screening, the rockfill concrete is quickly formed, the construction safety of TBM is greatly improved, and the risk of blocking machines is reduced; the material is obtained locally, the excavation material of the tunnel is fully utilized, a plurality of construction links such as transportation, mixing, vibration and the like are reduced, the cement consumption is reduced, the construction cost is reduced, and the environmental pollution is weakened; meanwhile, the large stone frameworks have larger pores and are easily filled with self-compacting concrete with super-strong fluidity, so that the backfill compactness is greatly improved; and finally, the whole backfilling process completely depends on gravity accumulation or self-flow, so that the potential safety hazards of high-pressure blow filling and high-pressure consolidation grouting are avoided while the construction is simplified. Therefore, the technical problem that the related technology cannot achieve the purpose of safe, environment-friendly, economical and high-quality tunnel lining construction of tunnel engineering is solved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a flow chart of a method for utilizing TBM ballast in situ in a ground cavity according to an embodiment of the application;

FIG. 2 is a schematic illustration of backfilling of rockfill during TBM tunneling according to one embodiment of the present application;

FIG. 3 is a schematic diagram of the in-situ utilization of TBM ballast in accordance with one embodiment of the present application

FIG. 4 is an exemplary illustration of an apparatus for in-situ utilization of TBM ballast in a cavern in accordance with an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of the full-face hard rock tunnel boring machine provided in the embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

The method and the device for utilizing the TBM ballast in the underground cavity in the embodiment of the application are described below with reference to the attached drawings. Aiming at the problem that the related technology mentioned in the background technology center can not achieve the purpose of safe, environment-friendly, economic and high-quality tunnel lining construction of tunnel engineering, the application provides a method for utilizing TBM stone ballast in situ, in the method, firstly, TBM excavation stone ballast is screened and collected, secondly, lining templates are installed and large stone ballast is backfilled, and finally, hole ballast self-compacting concrete is configured and backfilled, wherein in the excavation stone ballast screening and collecting step, large stone ballast with more than certain grain size is screened and stored in a stone storage bin on a small train in the hole after being residual, and screened small stone ballast and stone dust are transported to the rear; mounting a lining template in a TBM (tunnel boring machine), and then backfilling the large stone slag to a gap between surrounding rock and the lining template by using a stone conveyor to form a stone skeleton; the method comprises the steps of configuring and backfilling the hole slag self-compacting concrete, wherein small stone slag is firstly screened into coarse aggregate, fine aggregate and stone powder admixture according to particle size at the rear, then the obtained raw material is utilized to configure the hole slag self-compacting concrete, finally the configured self-compacting concrete is backfilled to the lining space of the existing stone skeleton, gaps among the stone skeleton are filled in a self-compacting mode through the super-flowability of the self-compacting concrete, a lining of a rockfill concrete structure is formed, the advantages of the rockfill concrete structure are fully exerted, after excavation, the TBM stone slag is directly placed in a warehouse through simple screening, the rockfill concrete is quickly formed, the construction safety of TBM is greatly improved, and the risk of blocking machines is reduced; the material is obtained locally, the excavation material of the tunnel is fully utilized, a plurality of construction links such as transportation, mixing, vibration and the like are reduced, the cement consumption is reduced, the construction cost is reduced, and the environmental pollution is weakened; meanwhile, the large stone frameworks have larger pores and are easily filled with self-compacting concrete with super-strong fluidity, so that the backfill compactness is greatly improved; and finally, the whole backfilling process completely depends on gravity accumulation or self-flow, so that the potential safety hazards of high-pressure blow filling and high-pressure consolidation grouting are avoided while the construction is simplified. Therefore, the technical problem that the related technology cannot achieve the purpose of safe, environment-friendly, economical and high-quality tunnel lining construction of tunnel engineering is solved.

Specifically, fig. 1 is a schematic flow chart of a method for utilizing TBM ballast in a ground cavity according to an embodiment of the present disclosure.

As shown in figure 1, the method for utilizing the TBM ballast in the ground hole comprises the following steps:

in step S101, the ballast when the full-face hard rock tunnel boring machine TBM excavates is collected, the ballast larger than the preset particle size is screened, and the remaining ballast is transported out of the tunnel while the ballast larger than the preset particle size is stored in the in-tunnel storage bin.

It can be understood that the first step is an excavation ballast screening and collecting step, namely, TBM excavation, and the ballast is screened and collected in real time, including screening large ballast with a particle size larger than a certain size and then storing the screened large ballast in a storage bin in the tunnel, and transporting screened small ballast and rock powder out of the tunnel. The predetermined particle size can be set by those skilled in the art according to actual conditions, and will be exemplified below.

Optionally, in an embodiment of the present application, the predetermined grain size is less than or equal to a gap width between the surrounding rock and the lining form, and is greater than or equal to 25 mm. That is, the particle size of the large rock blocks which are left after screening is not larger than the width of the gap between the surrounding rock and the lining template and is not smaller than 25mm, and the large rock blocks can be suitable for a double-shield TBM and an open TBM.

In the step S102, a lining template is synchronously installed behind a main machine of the TBM in the excavation and tunneling process, and a stone conveyor is adopted to backfill the stone ballast in the storage bin to a gap between the surrounding rock and the lining template, so that a rock block framework for supporting the surrounding rock is formed.

It can be understood that the second step is lining templates and large stone ballast backfilling, namely, in the process of excavating and tunneling the TBM, the lining templates are synchronously installed behind the main machine of the TBM, and then the large stone ballast in the storage bin is backfilled to a gap between the surrounding rock and the lining templates by using a stone conveyor to form a stone ballast framework to support the surrounding rock at first.

Optionally, in an embodiment of the present application, backfilling the ballast in the storage bin to a gap between the surrounding rock and the lining form by using a stone conveyor, includes: backfilling the stone ballast in the bin to a gap between the surrounding rock and the lining template through a backfilling hole reserved on the lining template; or backfilling the stone ballast in the storage bin to a gap between the surrounding rock and the lining template through a backfilling pipe reserved on a tail shield of the TBM.

Wherein, in one embodiment of the present application, the backfill holes or tubes are located at a position of the tunnel crown slightly offset from vertical by a predetermined distance.

Specifically, the rock block and the self-compacting concrete are backfilled into the cavity between the lining templates, and the rock block and the self-compacting concrete can pass through backfilling holes reserved in the lining templates and backfilling pipes reserved in a TBM tail shield. In addition, the backfill holes or the backfill pipes are positioned at the position slightly deviated from the vertical line of the top arch of the tunnel, so that the backfill materials can be naturally compacted to the whole cavity under the action of gravity, and the backfill materials can not be accumulated right above the top arch.

Optionally, in an embodiment of the present application, the lining form is any one of a steel pipe segment, a concrete pipe segment, and a concrete supporting form. That is, the lining form may be, but not limited to, any one of a steel pipe segment, a concrete pipe segment, and a concrete supporting form.

Optionally, in one embodiment of the present application, the stone conveyor comprises a screw conveyor and a belt conveyor. That is, the stone conveyor may be, but not limited to, a screw conveyor or a belt conveyor, and the conveying manner may be various types, and is not particularly limited.

In step S103, the remaining stone slag is screened into a coarse aggregate, a fine aggregate and a stone powder admixture according to the particle size, the admixture is used as a concrete raw material to prepare the hole slag self-compacting concrete, and the hole slag self-compacting concrete is pumped into the lining space of the existing block stone framework, so as to form the tunnel lining of the rockfill concrete structure.

It can be understood that the third step is the allocation and backfilling of the hole slag self-compacting concrete, namely, the small stone slag is firstly screened into coarse aggregate, fine aggregate and stone powder admixture according to the particle size at the rear, then the hole slag self-compacting concrete is allocated by using the obtained raw material, finally the allocated self-compacting concrete is pumped into the lining space of the existing stone skeleton, the gap between the stone skeletons is densely filled by means of the super-strong fluidity of the self-compacting concrete, the tunnel lining of the rockfill concrete structure is formed, the advantages of the in-situ utilization of the TBM stone slag and the rockfill concrete structure can be fully exerted, the construction safety of the TBM is greatly improved, and the risk of blocking machines is reduced; the materials can be obtained locally, the tunnel excavation materials are fully utilized, the cement consumption is reduced, the construction cost is reduced, and the environmental pollution is weakened; meanwhile, the large stone frameworks have larger pores and are easily filled with self-compacting concrete with super-strong fluidity, so that the backfill compactness is greatly improved; and finally, the whole backfilling process completely depends on gravity accumulation or self-flow, so that the potential safety hazard caused by high-pressure blow filling and high-pressure consolidation grouting is avoided while the construction is simplified.

It should be noted that the admixture of coarse aggregate, fine aggregate and stone powder screened from the small stone slag should meet the grading requirement of the concrete raw material, and the slump expansion of the self-compacting concrete should be over 600mm without segregation.

Optionally, in an embodiment of the present application, pumping the hole slag self-compacting concrete into a lining space of an existing rock block skeleton includes: completing the self-compacting concrete of the tunnel slag in supporting equipment behind the TBM in the tunnel, and pumping the self-compacting concrete of the tunnel slag into a lining space; or the mixing plant outside the tunnel finishes the self-compacting concrete of the tunnel slag, and the self-compacting concrete of the tunnel slag is conveyed into the tunnel through the storage bin and is pumped into the lining space.

In particular, the pumping of self-compacting concrete may be, but is not limited to, machines used including squeeze concrete pumps, hydraulic piston concrete pumps. Wherein, the screening of fritter slabstone and the configuration of self-compaction concrete both can accomplish in the supporting equipment behind the TBM in the tunnel, directly carry out the pump sending, perhaps can accomplish at the outer mix building in hole, carry into the tunnel through the feed bin and carry out the pump sending.

To sum up, the embodiment of the application firstly utilizes the large stones in the slag material of the tunnel excavation to backfill and form the early deformation of the block stone framework to resist the surrounding rock, then takes other small materials of the tunnel excavation as the aggregate and admixture of the self-compacting concrete, and finally forms the tunnel lining layer with the rockfill concrete structure by enabling the self-compacting concrete to automatically flow and tightly fill the pores between the rockfill frameworks. According to the method, the advantages of the TBM stone slag in-situ utilization and the rock-fill concrete material are brought into play, so that the construction cost is effectively reduced, the construction pollution is reduced, the construction safety is improved, and the construction quality is effectively guaranteed.

The principle of the method according to the embodiment of the present application will be described in detail with reference to fig. 2 and 3 as an embodiment. Wherein, 1 represents the country rock, 2 represents the TBM, 3 represents the lining template, 4 represents the rock aggregate storehouse, 5 represents the stone conveyer, 6 represents the rock aggregate, 7 represents the self-compaction concrete storehouse, 8 represents the self-compaction concrete pumping system, and 9 represents the hole sediment self-compaction concrete.

Specifically, the TBM 2 tunnels excavated hole slag in the surrounding rock 1, and after screening, the hole slag leaves the rock blocks 6 which are stored in a rock block storage bin 4. The stone conveyor 5 conveys and backfills the block stones 6 in the block stone storage bin 4 to the gap between the duct piece and the surrounding rock, and then the hole slag self-compacting concrete 9 stored in the self-compacting concrete storage bin 7 is pumped to the gap between the surrounding rock and the duct piece, which is backfilled with the block stones 6, through the self-compacting concrete pumping system 8.

For example, the embodiment of the present application includes the following steps:

step S1: TBM 2 excavates surrounding rock 1, and carries out screening and collection on stone slag in the tunnel in real time, wherein the screening and collection of the rock slag comprise that rock blocks 6 with the particle size not larger than the gap width between the surrounding rock and a supporting layer and not smaller than 25mm are stored in a rock block storage bin 4, and screened small stone slag and stone powder are transported out of the tunnel;

step S2: in the process of excavating and tunneling TBM 2, a lining template 3 is synchronously installed in the TBM 2, and then a spiral stone conveyor 5 is adopted to backfill the stones 6 in a stone block bin 4 to a gap between the surrounding rock and the lining template layer to form a stone block framework to support the surrounding rock;

step S3: and screening the small stone slag into admixture of coarse aggregate, fine aggregate and stone powder meeting the concrete grading requirement according to the particle size at the rear, preparing the hole slag self-compacting concrete 9 by using the obtained raw materials, wherein the slump expansion degree of the hole slag self-compacting concrete 9 is 700mm, and transporting the hole slag into a hole by using a self-compacting concrete bin 7.

Step S4: and finally, pumping the prepared hole slag self-compacting concrete 9 into a lining space of the existing block stone 6 skeleton, and densely filling gaps among the block stone 6 skeletons by means of the super-strong flowability of the hole slag self-compacting concrete 9 to form a tunnel lining of a rockfill concrete structure.

Step S5: and iterating the steps to repeatedly perform the lining construction of the TBM stone ballast tunnel.

According to the method for utilizing the TBM rock ballast in the ground hole, provided by the embodiment of the application, firstly, screening and collecting the TBM excavation rock ballast, secondly, installing a lining template and backfilling large rock ballast, and finally, configuring and backfilling self-compacting concrete of the rock ballast, wherein in the step of screening and collecting the excavation rock ballast, the step of screening and collecting the large rock ballast with more than a certain particle size is stored in a rock ballast bin on a small train in the hole after screening the large rock ballast with more than a certain particle size in the tunneling process, and the screened small rock ballast and rock powder are transported to the rear; mounting a lining template in a TBM (tunnel boring machine), and then backfilling the large stone slag to a gap between surrounding rock and the lining template by using a stone conveyor to form a stone skeleton; the method comprises the steps of configuring and backfilling the hole slag self-compacting concrete, wherein small stone slag is firstly screened into coarse aggregate, fine aggregate and stone powder admixture according to particle size at the rear, then the obtained raw material is utilized to configure the hole slag self-compacting concrete, finally the configured self-compacting concrete is backfilled to the lining space of the existing stone skeleton, gaps among the stone skeleton are filled in a self-compacting mode through the super-flowability of the self-compacting concrete, a lining of a rockfill concrete structure is formed, the advantages of the rockfill concrete structure are fully exerted, after excavation, the TBM stone slag is directly placed in a warehouse through simple screening, the rockfill concrete is quickly formed, the construction safety of TBM is greatly improved, and the risk of blocking machines is reduced; the material is obtained locally, the excavation material of the tunnel is fully utilized, a plurality of construction links such as transportation, mixing, vibration and the like are reduced, the cement consumption is reduced, the construction cost is reduced, and the environmental pollution is weakened; meanwhile, the large stone frameworks have larger pores and are easily filled with self-compacting concrete with super-strong fluidity, so that the backfill compactness is greatly improved; and finally, the whole backfilling process completely depends on gravity accumulation or self-flow, so that the potential safety hazards of high-pressure blow filling and high-pressure consolidation grouting are avoided while the construction is simplified.

Next, a device for utilizing the TBM ballast in the ground in the hole is described by referring to the attached drawings.

FIG. 4 is a block diagram of an apparatus for in-situ utilization of TBM ballast in a tunnel according to an embodiment of the present application.

As shown in fig. 4, the apparatus 10 for utilizing TBM ballast in situ includes: an acquisition module 100, a backfill module 200, and a pumping module 300.

Specifically, the collection module 100 is configured to collect ballast when the full-face hard rock tunnel boring machine TBM excavates, screen ballast larger than a preset particle size, and transport remaining ballast out of the tunnel while storing ballast larger than the preset particle size in the in-tunnel bin.

And the backfilling module 200 is used for synchronously installing a lining template behind a main machine of the TBM in the excavation and tunneling process, and backfilling the rock ballast in the storage bin to a gap between the surrounding rock and the lining template by using a stone conveyor to form a rock block framework for supporting the surrounding rock.

And the pumping module 300 is used for screening the residual stone slag into a coarse aggregate, a fine aggregate and a stone powder admixture according to the particle size, configuring the hole slag self-compacting concrete as a concrete raw material, and pumping the hole slag self-compacting concrete into the lining space of the existing block stone framework to form the tunnel lining of the rockfill concrete structure.

It should be noted that the explanation of the embodiment of the method for utilizing the TBM ballast in the ground hole is also applicable to the device for utilizing the TBM ballast in the ground hole of the embodiment, and the details are not repeated here.

According to the device for utilizing the TBM rock ballast in the ground hole, firstly, screening and collecting the TBM excavation rock ballast, secondly, installing a lining template and backfilling large rock ballast, and finally, configuring and backfilling self-compacting concrete of the rock ballast, wherein in the step of screening and collecting the excavation rock ballast, the step comprises the steps of storing the large rock ballast with more than a certain particle size in a rock ballast bin on a small train in the hole after screening the large rock ballast with more than a certain particle size in the tunneling process, and transporting the screened small rock ballast and rock powder to the rear; mounting a lining template in a TBM (tunnel boring machine), and then backfilling the large stone slag to a gap between surrounding rock and the lining template by using a stone conveyor to form a stone skeleton; the method comprises the steps of configuring and backfilling the hole slag self-compacting concrete, wherein small stone slag is firstly screened into coarse aggregate, fine aggregate and stone powder admixture according to particle size at the rear, then the obtained raw material is utilized to configure the hole slag self-compacting concrete, finally the configured self-compacting concrete is backfilled to the lining space of the existing stone skeleton, gaps among the stone skeleton are filled in a self-compacting mode through the super-flowability of the self-compacting concrete, a lining of a rockfill concrete structure is formed, the advantages of the rockfill concrete structure are fully exerted, after excavation, the TBM stone slag is directly placed in a warehouse through simple screening, the rockfill concrete is quickly formed, the construction safety of TBM is greatly improved, and the risk of blocking machines is reduced; the material is obtained locally, the excavation material of the tunnel is fully utilized, a plurality of construction links such as transportation, mixing, vibration and the like are reduced, the cement consumption is reduced, the construction cost is reduced, and the environmental pollution is weakened; meanwhile, the large stone frameworks have larger pores and are easily filled with self-compacting concrete with super-strong fluidity, so that the backfill compactness is greatly improved; and finally, the whole backfilling process completely depends on gravity accumulation or self-flow, so that the potential safety hazards of high-pressure blow filling and high-pressure consolidation grouting are avoided while the construction is simplified.

Fig. 5 is a schematic structural diagram of the full-face hard rock tunnel boring machine provided in the embodiment of the present application. The full face hard rock tunnel boring machine may include:

a memory 501, a processor 502, and a computer program stored on the memory 501 and executable on the processor 502.

The processor 502, when executing the program, implements the method of in-situ utilization of TBM ballast provided in the above embodiments.

Further, full face hard rock tunnel boring machine still includes:

a communication interface 503 for communication between the memory 501 and the processor 502.

A memory 501 for storing computer programs that can be run on the processor 502.

The memory 501 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.

Optionally, in a specific implementation, if the memory 501, the processor 502, and the communication interface 503 are integrated on a chip, the memory 501, the processor 502, and the communication interface 503 may complete communication with each other through an internal interface.

The processor 502 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.

The embodiment also provides a computer readable storage medium, which stores a computer program, wherein the program is executed by a processor to realize the method for utilizing the TBM ballast in the ground hole.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.