CN215329929U - A pipeline foundation ditch retaining structure for LNG gasification conversion - Google Patents

Abstract

The utility model relates to a pipeline foundation pit support structure for LNG gasification conversion, which comprises a plurality of first grouting columns respectively arranged at two sides of a foundation pit, wherein the first grouting columns are driven into a soil layer from top to bottom and internally provided with first grouting, concrete support assemblies are respectively arranged at the upper and lower positions between the first grouting columns at the two sides of the foundation pit, a plurality of uniformly distributed steel support columns are arranged between the upper and lower concrete support assemblies, water filter pipes are respectively paved at two sides and the bottom of the foundation pit and are commonly connected with a water pumping well, and water in the water pumping well is pumped out through a water pumping pump. The utility model has the following advantages: by enhancing the enclosure strength of the foundation pit, the stability and the service life of the pipeline are ensured, and the pipeline is prevented from leaking.

Description

A pipeline foundation ditch retaining structure for LNG gasification conversion

The technical field is as follows:

the utility model belongs to the field of LNG (liquefied natural gas) gasification, and particularly relates to a pipeline foundation pit support structure for LNG gasification conversion.

Background art:

with the continuous deepening implementation of domestic energy conservation and emission reduction and the continuous optimization and adjustment of an energy structure, liquefied natural gas is an important source of energy input of China in a certain period in future, LNG receiving stations are uniformly distributed in coastal areas, Liquid Natural Gas (LNG) needs to be heated to be gaseous (NG) and then is conveyed to inland, LNG gasification conversion is achieved, and pipelines for conveying the Liquid Natural Gas (LNG) need to be laid through a foundation pit maintenance structure in the gasification conversion process.

The prior foundation pit enclosure structure generally has the following defects: 1. when the foundation pit is excavated, the change of a soil body stress field can be caused, the deformation of the ground surface is inevitably generated, so that the stress balance state of the peripheral laid pipeline is damaged, the additional displacement and stress of the pipeline are caused, the phenomenon of pipeline cracking is caused, and particularly, the leakage of the liquefied natural gas generates great potential safety hazard; 2. if mud is discharged or drainage is not in place at the foundation pit, the geological conditions around the natural gas pipeline can be changed, so that the original stability of the natural gas pipeline and the damage of the pipeline anticorrosive coating are damaged, and the deformation of the ground surface and the cracking of the pipeline are further accelerated.

The utility model has the following contents:

the utility model aims to overcome the defects and provide the pipeline foundation pit support structure for LNG gasification conversion, which ensures the stability and the service life of a pipeline and prevents the pipeline from leaking by enhancing the support strength of the foundation pit.

The purpose of the utility model is realized by the following technical scheme: the utility model provides a pipeline foundation ditch retaining structure for LNG gasification conversion, including arranging a plurality of first grout posts of foundation ditch both sides in respectively, first grout post is squeezed into the soil layer and inside has first grout from top to bottom, upper and lower position between the first grout post of foundation ditch both sides all is equipped with concrete supporting component, the steel support post that has a plurality of evenly distributed between two upper and lower concrete supporting component, the strainer has all been laid to the both sides and the bottom of foundation ditch, a plurality of strainer are connected with the pumped well jointly, water in the pumped well is pumped out through the suction pump and is removed.

The utility model is further improved in that: the concrete supporting component comprises supporting columns connected with the end parts of a plurality of first grouting columns on the same side, and a plurality of X-shaped connecting columns arranged between the supporting columns and corresponding to two levels, the steel supporting columns are vertically arranged between the two X-shaped connecting columns distributed from top to bottom, the center positions of the X-shaped connecting columns of the concrete supporting component arranged at the lower end are provided with connecting columns, the upper ends of the connecting columns are provided with arc-shaped supporting frames, and pipelines are arranged on the arc-shaped supporting frames.

The utility model is further improved in that: the upper end face of the arc-shaped support frame is provided with a buffer layer.

The utility model is further improved in that: the bottom of foundation ditch has a plurality of second grout posts along the extending direction distribution of foundation ditch, second grout post from top to bottom slope distribution, the second grout has the second grout in the post, and the upper end of second grout post and the X type spliced pole fixed connection that corresponds.

The utility model is further improved in that: and the X-shaped connecting column is provided with a grouting hole for grouting the second grouting column.

Compared with the prior art, the utility model has the following advantages:

1. set up a plurality of first grout columns at the side of foundation ditch to improve the soil body structural strength of foundation ditch side, played the effect of tentatively avoiding the base to warp, secondly set up concrete strut subassembly and steel support post between first grout column, further strengthened foundation ditch enclosure strength, thereby guarantee the stability and the life of pipeline laying, avoid making the pipeline be in the unbalanced state of atress because of the earth's surface warp, avoid the pipeline fracture to leak.

2. Set up strainer, pumped well and suction pump in the foundation ditch, guarantee the emission to mud and liquid in the foundation ditch, avoid destroying the original stability of pipeline or cause the destruction of pipeline anti-corrosion coating, the pipeline setting has relatively heightened the height of laying of pipeline on arc support frame simultaneously, has further avoided the contact of mud and liquid in pipeline and the foundation ditch.

3. The lower end of the concrete supporting component on the lower side is provided with the plurality of second grouting columns, the plurality of second grouting columns are distributed along the extending direction of the foundation pit, the effect of reinforcing and enclosing the bottom of the foundation pit is achieved, the second grouting columns are obliquely arranged, the contact area of the second grouting columns and a soil body is enlarged, and the enclosing effect of the bottom of the foundation pit is further increased.

Description of the drawings:

fig. 1 is a schematic structural diagram of a pipeline foundation pit enclosure structure for LNG gasification conversion according to the present invention.

Fig. 2 is a sectional view of the structure taken along the line a-a in fig. 1.

Reference numbers in the figures:

1-a foundation pit, 2-a first grouting column, 3-a first grouting, 4-a concrete support component, 5-a steel support column, 6-a strainer, 7-a pumping well and 8-a pumping pump;

42-supporting columns, 43-X-shaped connecting columns, 44-connecting columns, 45-arc-shaped supporting frames, 46-grouting holes, 47-buffer layers, 48-second grouting columns and 49-second grouting.

The specific implementation mode is as follows:

for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship, such as one based on the drawings, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the structure or unit indicated must have a specific orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise specified and limited, terms such as "connected," "provided," "having," and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, or directly connected, and may be connected through an intermediate medium, so that those skilled in the art can understand the basic meaning of the above terms in the present invention according to specific situations.

Fig. 1 shows an embodiment of a pipeline foundation pit support structure for LNG gasification conversion according to the present invention, which includes a plurality of first grouting columns 2 respectively disposed at two sides of a foundation pit 1, the first grouting columns 2 are driven into a soil layer from top to bottom and have first grouting 3 inside, concrete support assemblies 4 are disposed at upper and lower positions between the first grouting columns 2 at two sides of the foundation pit 1, a plurality of uniformly distributed steel support columns 5 are disposed between the upper and lower concrete support assemblies 4, water filter pipes 6 are laid at two sides and at a bottom of the foundation pit 1, the water filter pipes 6 are commonly connected to a water pumping well 7, and water in the water pumping well 7 is pumped by a water pumping pump 8.

Further, the concrete supporting component 4 includes the support column 42 of connecting the 2 tip of a plurality of first grout post of homonymy to and arrange in a plurality of X type spliced poles 43 between two levels correspond support column 42, the vertical setting of steel support post 5 is between two X type spliced poles 43 that distribute from top to bottom, the central point of a plurality of X type spliced poles 43 of the concrete supporting component 4 of arranging the lower extreme in has spliced pole 44, the upper end of spliced pole 44 has arc support frame 45, the pipeline is arranged in on arc support frame 45.

Set up a plurality of first grout posts 2 at the side of foundation ditch 1 to the soil body structural strength of 1 side of foundation ditch has been improved, played the effect of preliminary avoiding the base to warp, secondly set up concrete strut assembly 4 and steel support post 5 between first grout post 2, further strengthened foundation ditch 1 enclosure strength, thereby guarantee the stability and the life of pipeline laying, avoid making the pipeline be in the unbalanced state of atress because of the earth's surface warp, avoid the pipeline fracture to leak.

Set up strainer 6, pumped well 7 and suction pump 8 in foundation ditch 1, guarantee the emission to mud and liquid in foundation ditch 1, avoid destroying the original stability of pipeline or cause the destruction of pipeline anti-corrosion coating, the pipeline setting has relatively heightened the height of laying of pipeline on arc support frame 45 simultaneously, has further avoided the contact of mud and liquid in pipeline and foundation ditch 1.

Further, the upper end face of arc support 45 has buffer layer 47, plays the effect of buffer protection to the pipeline surface.

Further, as shown in fig. 2, a plurality of second grouting columns 48 are distributed at the bottom of the foundation pit 1 along the extending direction of the foundation pit 1, the second grouting columns 48 are obliquely distributed from top to bottom, second grouting 49 is provided in the second grouting columns 48, and the upper ends of the second grouting columns 48 are fixedly connected with the corresponding X-shaped connecting columns 43.

The lower end of the concrete supporting component 4 on the lower side is provided with the plurality of second grouting columns 48, the plurality of second grouting columns 48 are distributed along the extending direction of the foundation pit 1 to play a role in reinforcing and enclosing the bottom of the foundation pit 1, and the second grouting columns 48 which are obliquely arranged increase the contact area of the second grouting columns 48 and a soil body and further increase the enclosing effect of the bottom of the foundation pit 1.

Further, the X-shaped connecting column 43 has a grouting hole 46 for grouting a second grouting column 48.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (5)

1. The utility model provides a pipeline foundation ditch envelope for LNG gasification conversion which characterized in that: including arranging a plurality of first grout posts of foundation ditch both sides in respectively, first grout post is squeezed into soil layer and inside from top to bottom has first grout, upper and lower position between the first grout post of foundation ditch both sides all is equipped with concrete supporting component, has a plurality of evenly distributed's steel support post between the two upper and lower concrete supporting component, the strainer has all been laid to the both sides and the bottom of foundation ditch, and a plurality of strainer are connected with the pumped well jointly, the water in the pumped well is pumped out through the suction pump.

2. The pipeline foundation pit enclosure structure for LNG gasification conversion of claim 1, wherein: concrete supporting component is including the support column of connecting a plurality of first grout post tip of homonymy to and arrange two levels in and correspond a plurality of X type spliced poles between the support column, the vertical setting of steel support post is between two X type spliced poles that distribute from top to bottom, and the central point of arranging a plurality of X type spliced poles of concrete supporting component of lower extreme in puts and has the spliced pole, the upper end of spliced pole has ARC support frame, and the pipeline is arranged in on ARC support frame.

3. The pipeline foundation pit enclosure structure for LNG gasification conversion of claim 2, wherein: the upper end face of the arc-shaped support frame is provided with a buffer layer.

4. A pipeline foundation pit enclosure structure for LNG gasification conversion according to claim 2 or 3, characterized in that: the bottom of foundation ditch has a plurality of second grout posts along the extending direction distribution of foundation ditch, second grout post from top to bottom slope distribution, the second grout has the second grout in the post, and the upper end of second grout post and the X type spliced pole fixed connection that corresponds.

5. The pipeline foundation pit enclosure structure for LNG gasification conversion of claim 4, wherein: and the X-shaped connecting column is provided with a grouting hole for grouting the second grouting column.

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