CN109707397B - Pipe curtain construction method - Google Patents
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- CN109707397B CN109707397B CN201811648896.9A CN201811648896A CN109707397B CN 109707397 B CN109707397 B CN 109707397B CN 201811648896 A CN201811648896 A CN 201811648896A CN 109707397 B CN109707397 B CN 109707397B
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Abstract
The invention provides a pipe curtain construction method, which is applied to the construction of an annular pipe curtain structure of a tunnel and comprises the following steps: layering a plurality of steel pipes of the annular pipe curtain structure from top to bottom according to spatial positions; constructing the layered pipe curtain structure from the uppermost layer to the bottommost layer in sequence; when the steel pipes on each layer are constructed, the construction is firstly carried out from the middle steel pipe and then the construction is simultaneously carried out on the steel pipes positioned at the two sides of the middle steel pipe; construction is performed from both ends of the steel pipe to the middle position in the longitudinal direction of each steel pipe. The pipe curtain construction method solves the problem of large ground rail settlement caused by tunnel pipe curtain construction in the prior art.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a pipe curtain construction method.
Background
The required precision of the conventional tunnel on the settlement of the roadbed constructed on the ground is not very high in the construction process and after the construction is finished, the existing buildings are arranged above the tunnel in some tunnels along with the expansion of railways and highways, once the tunnel below is excavated, the settlement phenomenon is inevitably caused to a certain extent, the settlement is more obvious after the time is longer, the buildings above the tunnel construction are damaged and even collapse, and the tunnel construction is very dangerous.
For example, because a certain existing railway station is located in the center of a city, traffic jam occurs on the road, a new road is urgently needed to be set up to disperse traffic flow, and two underground lanes are set up in a certain municipal plan to pass through the railway station, so that the existing road jam can be relieved, and the problem that the distance is lengthened because the road needs to bypass the railway station in the prior art is solved. However, two roads need to pass through the lower part of a railway station in tunnel construction, and the tunnel construction process has extremely strict requirements on the existing pavement settlement in the excavation process, and the maximum settlement of a roadbed is 10mm, so that how to control the ground settlement in the tunnel construction process becomes the key for success or failure of the project, and the tunnel pipe curtain construction method in the prior art cannot guarantee the settlement requirements of the ground on the road.
Disclosure of Invention
The invention mainly aims to provide a pipe curtain construction method to solve the problem of large ground rail settlement caused by tunnel pipe curtain construction in the prior art.
In order to achieve the above object, the present invention provides a pipe curtain construction method, which is applied to construction of an annular pipe curtain structure of a tunnel, and comprises: layering a plurality of steel pipes of the annular pipe curtain structure from top to bottom according to spatial positions; constructing the layered pipe curtain structure from the uppermost layer to the bottommost layer in sequence; when the steel pipes on each layer are constructed, the construction is firstly carried out from the middle steel pipe and then the construction is simultaneously carried out on the steel pipes positioned at the two sides of the middle steel pipe; construction is performed from both ends of the steel pipe to the middle position in the longitudinal direction of each steel pipe.
Further, when each steel pipe is constructed, the steel pipe is divided into a plurality of sections of steel pipe sections along the length direction, the plurality of sections of the steel pipe sections of each steel pipe are divided into a plurality of groups according to the construction sequence, each group of the steel pipe sections comprises at least one section of the steel pipe section, and the construction of the next group of the steel pipe sections is carried out after the construction of each group of the steel pipe sections is completed.
Further, each group of steel pipe sections comprises two steel pipe sections, and the construction method of each group of steel pipe sections comprises the following steps: cutting each steel pipe section; supporting each steel pipe section; pouring concrete into each steel pipe section; and when concrete is poured into the steel pipe sections, the next group of steel pipe sections are cut, and the construction is circulated until the whole steel pipe is constructed.
Furthermore, after the cutting of the group of steel pipe sections is completed, the inner sides of the steel pipe sections are excavated, and the steel pipe sections are supported after the excavation is completed.
Further, the method for cutting the steel pipe section comprises the following steps: cutting from the inner side to the outer side of the steel pipe section; firstly, cutting along the length direction of the steel pipe, and then cutting along the radial direction of the steel pipe; and cutting the other side of the steel pipe section after one side of the steel pipe section is cut.
Further, the construction method for supporting the steel pipe comprises the following steps: arranging a jack or a steel pipe on the inner side of the steel pipe to jack the cut steel pipe from inside to outside; and connecting the cutting positions of the two adjacent steel pipes by using a connecting plate so as to realize the communication between the two adjacent steel pipes.
Further, when the steel pipe is segmented, the segmentation is carried out according to the ground settlement requirement above the steel pipe, and the length of each steel pipe section ranges from 3m to 10 m.
Further, after the construction of the steel pipes on the pipe curtain structure of one layer is finished, the main body strength of the pipe curtain structure is tested, and after the main body strength test of the pipe curtain structure of the layer is qualified, the construction of the pipe curtain structure of the next layer is carried out.
Further, the method for testing the strength of the main body of the pipe curtain structure comprises the following steps: detecting whether the compactness of the concrete meets the requirement or not by using an ultrasonic detector; hammering the steel pipe to detect whether the concrete is tightly attached to the steel pipe.
Furthermore, after the construction of the bottommost layer of the pipe curtain structure is finished, the earthwork on the inner side of the whole annular pipe curtain structure is excavated, and after the excavation is finished, a road surface is laid above the pipe curtain structure on the bottommost layer.
When the construction method of the pipe curtain structure of the technical scheme of the invention is applied to the construction of the annular pipe curtain structure, according to the spatial position, the steel pipes forming the pipe curtain structure are constructed by adopting a construction method of layering from top to bottom, so that the settlement of buildings above the tunnel is limited to the maximum extent, when the construction is carried out on the steel pipe of the pipe curtain structure of each layer, the construction is firstly carried out from the steel pipe positioned in the middle of the horizontal position, and the construction is simultaneously carried out on the two sides of the steel pipe, thereby accelerating the construction progress, the construction method is adopted from the two ends of the steel pipe to the middle of the steel pipe along the length direction of the tunnel, thereby accelerating the construction progress, simultaneously be favorable to in time discharging the earthwork in the construction, adopt the above-mentioned mode of this application to construct the pipe curtain structure in tunnel and solved the tunnel pipe curtain construction among the prior art and caused the big problem of ground track subside.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view showing a construction sequence of an embodiment of a pipe curtain construction method according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A pipe curtain construction method, which is applied to construction of an annular pipe curtain structure of a tunnel, and referring to fig. 1, the pipe curtain construction method includes: layering a plurality of steel pipes of the annular pipe curtain structure from top to bottom according to spatial positions; constructing the layered pipe curtain structure from the uppermost layer to the bottommost layer in sequence; when the steel pipes on each layer are constructed, the construction is firstly carried out from the middle steel pipe and then the construction is simultaneously carried out on the steel pipes positioned at the two sides of the middle steel pipe; construction is performed from both ends of the steel pipe to the middle position in the longitudinal direction of each steel pipe.
The invention aims at the construction of a brand-new pipe curtain structure, the pipe curtain structure is formed by a plurality of steel pipes into an annular structure, when the annular pipe curtain structure is constructed, according to the spatial position, the steel pipes forming the pipe curtain structure are constructed by adopting a construction method of layering from top to bottom, so that the settlement of buildings above the tunnel is limited to the maximum extent, when the construction is carried out on the steel pipe of the pipe curtain structure of each layer, the construction is firstly carried out from the steel pipe positioned in the middle of the horizontal position, and the construction is simultaneously carried out on the two sides of the steel pipe, thereby accelerating the construction progress, the construction method is adopted from the two ends of the steel pipe to the middle of the steel pipe along the length direction of the tunnel, thereby accelerating the construction progress, simultaneously be favorable to in time discharging the earthwork in the construction, adopt the above-mentioned mode of this application to construct the pipe curtain structure in tunnel and solved the tunnel pipe curtain construction among the prior art and caused the big problem of ground track subside.
When each steel pipe is constructed, the steel pipe is divided into a plurality of sections of steel pipe sections along the length direction, the plurality of sections of the steel pipe sections of each steel pipe are divided into a plurality of groups according to the construction sequence, each group of steel pipe sections comprises at least one section of steel pipe section, and the construction of the next group of steel pipe sections is carried out after the construction of each group of steel pipe sections is completed. Each group of steel pipe sections comprises two steel pipe sections, and the construction method of each group of steel pipe sections comprises the following steps: cutting each steel pipe section; supporting each steel pipe section; pouring concrete into each steel pipe section; and when concrete is poured into the steel pipe sections, the next group of steel pipe sections are cut, and the construction is circulated until the whole steel pipe is constructed.
After cutting a group of steel pipe sections, excavating the inner sides of the steel pipe sections, and supporting the steel pipe sections after the excavation is finished.
The method for cutting the steel pipe section comprises the following steps: cutting from the inner side to the outer side of the steel pipe section; firstly, cutting along the length direction of the steel pipe, and then cutting along the radial direction of the steel pipe; and cutting the other side of the steel pipe section after one side of the steel pipe section is cut.
The construction method for supporting the steel pipe comprises the following steps: arranging a jack or a steel pipe on the inner side of the steel pipe to jack the cut steel pipe from inside to outside; and connecting the cutting positions of the two adjacent steel pipes by using a connecting plate so as to realize the communication between the two adjacent steel pipes.
When the steel pipe is segmented, the segmentation is carried out according to the ground settlement requirement above the steel pipe, and the length range of each steel pipe section is 3m to 10 m.
After the construction of the steel pipes on the pipe curtain structure of one layer is finished, the main body strength of the pipe curtain structure is tested, and after the main body strength test of the pipe curtain structure of the layer is qualified, the construction of the pipe curtain structure of the next layer is carried out.
The method for testing the strength of the main body of the pipe curtain structure comprises the following steps: detecting whether the compactness of the concrete meets the requirement or not by using an ultrasonic detector; hammering the steel pipe to detect whether the concrete is tightly attached to the steel pipe.
After the construction of the bottommost layer of the pipe curtain structure is finished, excavating the earth on the inner side of the whole annular pipe curtain structure, and paving a road surface above the pipe curtain structure at the bottommost layer after the excavation is finished.
The tube curtain structure of the invention has the following specific implementation modes:
and cutting and supporting the steel pipe with the pipe curtain structure and constructing the main structure according to longitudinal segmentation and horizontal layering. The main body structure of the channel is C40 self-compacting reinforced concrete with impervious grade P8.
The cutting, supporting and main structure construction of the pipe curtain structure steel pipe are conducted according to layering and subsection. Each layer is longitudinally divided into a plurality of flowing water sections, and construction is carried out from the middle to two sides simultaneously.
The cutting, supporting and main structure construction of the steel pipe are carried out alternately, flowing water is formed in each two sections, namely after the cutting and supporting of the steel pipe are finished, the main structure of the section is poured immediately, the cutting and supporting of the next flowing water section are carried out at the same time, but the steel pipe of the third section cannot be cut, and the circulation is carried out.
And in the vertical direction, after the first layer of main structure is poured and reaches the design strength, cutting and supporting of the second layer of steel pipe can be carried out.
The cutting, supporting and main structure construction sequence of the pipe curtain structure steel pipe is shown in figure 1. The description of the sequence drawings of cutting, supporting and main structure construction of the steel pipe is as follows:
the cutting preparation is human, machine, material preparation and technical preparation before cutting. And the cutting of the second layer and the second section is the inter-pipe cutting in the structural section. And (5) after the construction of the second-layer and the second-section structures is that the inner pipe gallery of the structure section is formed, performing reinforcement and concrete pouring construction.
In the longitudinal scope of main part, single work well worker district, intertube cutting length must not exceed two structure sections to accomplish simultaneously longest, as in the frame map, can carry out the first floor 2 nd section cutting and the construction of the first floor 1 st section structure simultaneously after the first floor 1 st section cutting is accomplished, if the first floor 2 nd section cutting is accomplished the back, the first floor 1 st section structure is not accomplished yet, must not carry out the intertube cutting of next structure section this moment, must wait for the first floor 1 st section structure to accomplish the back, the below can carry out the intertube cutting of next structure section.
When the first layer of main part and second floor structure are under construction alternately, the steel pipe must not cut simultaneously in the same structure section of upper and lower two-layer vertical. When the second layer 2 section is subjected to inter-pipe cutting, the first layer 2 section structure must be completed.
The main structure is constructed in sections according to the design, namely, each section of the main structure is 4 meters if a building is arranged above the tunnel, and each section of the main structure is 8 meters if no building is arranged above the tunnel.
And (4) carrying out structural reinforced concrete construction in the gallery, and circulating in sequence to finally form a permanent structure of the main body. And excavating earth in the formed structure, cutting the lateral arch rib, paving the road surface after finishing the interior, and finishing the channel.
The cutting and supporting sequence among the steel pipes is as follows:
(1) cutting and supporting sequence between pipes
After the steel pipe is jacked, cutting and supporting between adjacent steel pipes are carried out, and before the steel pipes are prepared to be cut, the following matters must be confirmed: firstly, the steel pipe which is pushed in is fully grouted after the wall is grouted, and soil bodies among the pipes are reinforced.
Secondly, the ground settlement reaches a stable value, and the settlement monitoring point tends to be in a stable state.
And after all the steel pipes are pushed to the end and have cutting conditions, cutting and welding the adjacent parts of the adjacent steel pipes. In order to ensure safety, for a single structural section, cutting and supporting are carried out twice, the length of the first cutting is 1400mm, adjacent steel pipes are transversely welded by steel plates, and double support columns are arranged at intervals of 1.2 m. The support column is a steel pipe with the wall thickness of D114mm being 4.5mm (the corner section is a steel pipe with the wall thickness of D121mm being 6.5 mm). The supporting columns are filled with C25 micro-expansion fine-stone concrete, and two ends of the supporting columns are provided with 160X 10mm backing plates (the corner sections are 180X 15 mm). The second cut length was 1000 mm. When cutting, the steel pipe is firstly cut longitudinally, and then cut along the vertical direction.
(2) Concrete process and requirements for cutting and supporting between pipes
The specific process and requirements for the cutting support between pipes are as follows:
the steel pipe cutting adopts plasma cutting, and the first cutting of steel pipe is jumped from inside to outside in proper order in this structure section and is done. Each cut was cut exactly to size. When cutting, the cutting is firstly carried out along the longitudinal direction of the main body, and then the cutting is carried out along the vertical direction.
The steel pipe is cut firstly from one side of the steel pipe, and the other side of the steel pipe is not cut temporarily. And (4) completing cutting of one side, and excavating soil between the pipes on one side after the steel plate is dismantled. When the soil is excavated between the pipes, the excavated surfaces of the waterproof steel plates and the fixed steel plates temporarily keep partial soil bodies not to be excavated. And cutting the steel pipe at the other side after the soil is dug between the pipes at one side. And after the steel pipe on the other side is cut, digging and trimming, wherein the installation parts of the waterproof steel plate and the fixed steel plate cannot be overetched.
After the steel pipe is cut, the steel plates are welded and connected between the pipes in time, and the soil body exposure time is shortened. The steel pipe cutting is divided into two times, and the steel plate setting is carried out in two times in sequence.
And (5) immediately supporting after the excavation of the soil body between the pipes is finished, and installing a waterproof steel plate and a fixed steel plate. When the waterproof steel plate and the fixed steel plate are installed, mortar is filled in the overexcavation part, and the steel plate is ensured to be closely attached to the soil body. In the process of mounting and supporting, a jack (50 tons and 2 jacks) is required to be used for temporary support until the waterproof steel plate and the fixed steel plate are welded and the supporting steel pipe is mounted.
After the jack is adopted for temporary support, welding is carried out strictly according to the requirements of the drawing. The joints of the steel plates and the steel pipes, the joints of the supporting steel pipes and the steel plates, the joints of the fixed steel plates and the steel pipes and the like need to be fully welded. The welding quality is strictly ensured during welding, and quality defects such as slag inclusion, undercut and the like cannot occur.
After the first cutting between this structure section intraductal is accomplished, arrange to carry out the cutting for the second time, the cutting requirement for the second time is the same with the aforesaid, need control good cutting in addition and the secondary steel pipe joint welding seam quality of cutting, and the welding seam height requirement is 7 mm.
The part of the supporting steel pipe and the fixed steel plate are not vertically arranged and form a certain included angle, and an angle gauge is adopted to check the angle during field installation and is processed in advance so as to be convenient to use.
(3) Attention points for cutting and supporting steel pipes
Attention to cutting of steel pipes
When the steel pipe is secondarily cut at the position close to the opening, the secondary cutting of the steel pipe at the position close to the opening can be carried out after the secondary cutting of the steel pipe at the position of the side opening is finished. And normal ventilation in the pipe is ensured during cutting and welding of the steel pipe, and air is kept fresh. And the monitoring and measuring are enhanced during the steel pipe cutting, the information construction is carried out, and the construction quality safety is ensured.
② setting cautions for steel plate
And (5) immediately supporting after the excavation of the soil body between the pipes is finished, and installing a connecting steel plate. The outside connection steel sheet is as the waterproof first line of defence of structure, and the welding seam quality between the welding seam between steel sheet and the steel pipe, steel sheet first, the secondary setting must satisfy the design strength requirement. The size of the connecting steel plate is set according to the specific size of the steel pipe cut on site, but the setting of the steel plate must meet the design requirement. Connecting the installation part of the steel plate, wherein the over-digging amount is not more than 5mm, and filling mortar into the over-digging part to ensure that the steel plate is closely attached to the soil body. When the steel pipe is cut, the cut steel plate needs to be lightly placed and cannot fall from a high place randomly so as to avoid damaging other parts of the steel pipe.
Notice about steel plate support
During the installation of the connecting steel plate, a jack is required to be used for temporary support until the welding and installation of the connecting steel plate are finished. The steel pipe support plays a role in supporting and stabilizing the space in the pipe before the main structure is constructed, so the steel pipe support is firmly arranged and is vertically arranged. The welding quality is strictly ensured during welding, and quality defects such as slag inclusion, undercut and the like are not caused. The part of the supporting steel pipe and the fixed steel plate are not vertically arranged and form a certain included angle, and an angle gauge is adopted to check the angle during field installation and is processed in advance so as to be convenient to use.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A pipe curtain construction method is applied to construction of an annular pipe curtain structure of a tunnel and is characterized by comprising the following steps:
layering a plurality of steel pipes of the annular pipe curtain structure from top to bottom according to spatial positions;
constructing the layered pipe curtain structure from the uppermost layer to the bottommost layer in sequence;
when the steel pipes on each layer are constructed, construction is firstly carried out on the steel pipes in the middle and then construction is simultaneously carried out on the steel pipes on the two sides of the steel pipes;
constructing from both ends of the steel pipe to a middle position in the length direction of each steel pipe;
after the construction of all the steel pipes on the pipe curtain structure of one layer is finished, testing the main body strength of the pipe curtain structure, and after the main body strength test of the pipe curtain structure of the layer is qualified, constructing the pipe curtain structure of the next layer;
when each steel pipe is constructed, dividing the steel pipe into a plurality of sections of steel pipe sections along the length direction, dividing the plurality of sections of steel pipe sections of each steel pipe into a plurality of groups according to the construction sequence, wherein each group of steel pipe sections comprises at least one section of steel pipe section, and constructing the next group of steel pipe sections after the construction of each group of steel pipe sections is completed;
each group of steel pipe sections comprises two steel pipe sections, and the construction method of each group of steel pipe sections comprises the following steps: cutting each steel pipe section; supporting each steel pipe section; pouring concrete into each steel pipe section; when concrete is poured into the steel pipe sections, cutting the next group of steel pipe sections, and performing the circulating construction until the whole steel pipe is constructed;
the method for cutting the steel pipe section comprises the following steps: cutting from the inside to the outside of the steel pipe section; firstly, cutting along the length direction of the steel pipe, and then cutting along the radial direction of the steel pipe; cutting the other side of the steel pipe section after one side of the steel pipe section is cut;
cutting the steel pipe, supporting and constructing the main structure are carried out alternately, flowing water is formed in each two sections, namely after the steel pipe is cut and supported, the main structure of the section is poured immediately, and the next flowing water section is cut and supported at the same time, but the steel pipe of the third section cannot be cut, so that the circulation is carried out;
the method for testing the strength of the main body of the pipe curtain structure comprises the following steps: detecting whether the compactness of the concrete meets the requirement or not by using an ultrasonic detector; hammering the steel pipe to detect whether the concrete is tightly attached to the steel pipe;
the construction method for supporting the steel pipe comprises the following steps: arranging a jack or a steel pipe on the inner side of the steel pipe so as to prop the cut steel pipe from inside to outside; and connecting the cutting positions of the two adjacent steel pipes by using a connecting plate so as to realize the communication between the two adjacent steel pipes.
2. The pipe curtain construction method according to claim 1, wherein after a group of the steel pipe sections are cut, the inner side of the steel pipe section is excavated, and the steel pipe section is supported after the excavation is completed.
3. The pipe curtain construction method according to claim 1, wherein when the steel pipe is sectioned, the sectioning is performed according to a ground settlement requirement above the steel pipe, and the length of each steel pipe section ranges from 3m to 10 m.
4. The pipe curtain construction method according to claim 1, wherein after the construction of the bottommost layer of the pipe curtain structure is finished, earth on the inner side of the whole annular pipe curtain structure is excavated, and after the excavation is finished, a road surface is laid above the bottommost pipe curtain structure.
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| CN201811648896.9A CN109707397B (en) | 2018-12-30 | 2018-12-30 | Pipe curtain construction method |
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| CN201811648896.9A CN109707397B (en) | 2018-12-30 | 2018-12-30 | Pipe curtain construction method |
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| CN109707397B true CN109707397B (en) | 2021-11-09 |
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| CN115142859B (en) * | 2022-09-01 | 2023-01-20 | 中国矿业大学(北京) | Pipe curtain construction equipment and pipe curtain construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536273A (en) * | 2012-03-30 | 2012-07-04 | 中建市政建设有限公司 | One-step forming construction method for 26m large-span space |
| CN105257297A (en) * | 2015-11-04 | 2016-01-20 | 中铁十八局集团有限公司 | Construction method for precisely controlling frozen soil curtain among pipes |
| CN106351670A (en) * | 2016-10-25 | 2017-01-25 | 中铁第四勘察设计院集团有限公司 | Closed pre-support tunnel structure |
-
2018
- 2018-12-30 CN CN201811648896.9A patent/CN109707397B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536273A (en) * | 2012-03-30 | 2012-07-04 | 中建市政建设有限公司 | One-step forming construction method for 26m large-span space |
| CN105257297A (en) * | 2015-11-04 | 2016-01-20 | 中铁十八局集团有限公司 | Construction method for precisely controlling frozen soil curtain among pipes |
| CN106351670A (en) * | 2016-10-25 | 2017-01-25 | 中铁第四勘察设计院集团有限公司 | Closed pre-support tunnel structure |
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