阅读说明：本技术 适用于建筑基础作业的地埋管施工方法 (Buried pipe construction method suitable for building foundation operation ) 是由 单天红 韩敏霞 刘玥 张文秀 谢栋辉 冯铮 于 2021-08-26 设计创作，主要内容包括：本发明提供了一种适用于建筑基础作业的地埋管施工方法的实施方式,该地埋管施工方法包括：S10：在土层中开挖建筑基坑；S20：对建筑基坑进行一次基础垫层浇筑并预留地埋管施工区域；S30：在地埋管施工区域内施工安装地埋管；S40：对地埋管施工区域进行二次基础垫层浇筑。与现有技术相比,采用本发明的技术方案,可以在建筑基础作业,保护地源热泵的地埋管,避免在建筑基坑开挖过程中被损坏；此外,一次基础垫层也可以避免因雨季土壤松软造成的地埋管的管沟部分处土壤护坡坍塌,减少对土壤层的扰动等情况。这样一来,就缩减了重新打孔、连管等重复工程量,缩短了施工周期,节省了施工费用。(The invention provides an implementation mode of a buried pipe construction method suitable for building foundation operation, and the buried pipe construction method comprises the following steps: s10: excavating a building foundation pit in a soil layer; s20: carrying out primary foundation cushion layer pouring on the building foundation pit and reserving a buried pipe construction area; s30: constructing and installing the buried pipe in a buried pipe construction area; s40: and carrying out secondary foundation cushion pouring on the buried pipe construction area. Compared with the prior art, the technical scheme of the invention can be used for operating on the building foundation to protect the buried pipe of the ground source heat pump and avoid being damaged in the excavation process of the building foundation pit; in addition, the primary foundation pad layer can also avoid the soil slope collapse of the pipe trench part of the buried pipe caused by the loose and soft soil in rainy season, and the disturbance to the soil layer is reduced. Therefore, the repeated work amount of re-punching, pipe connection and the like is reduced, the construction period is shortened, and the construction cost is saved.)

1. A buried pipe construction method suitable for building foundation operation is characterized by comprising the following steps:

s10: excavating a building foundation pit (10) in a soil layer;

s20: primary foundation cushion (20) pouring is carried out on the building foundation pit (10) and a buried pipe construction area is reserved;

s30: constructing and installing a buried pipe in the buried pipe construction area;

s40: and pouring a secondary foundation cushion layer (20') in the buried pipe construction area.

2. The ground pipe construction method according to claim 1, wherein the ground pipe construction area is reserved using a formwork (30) enclosing on the soil layer in the S20.

3. The underground pipe construction method according to claim 1, wherein the S30 includes:

s31: digging out an installation pit in the buried pipe construction area;

s32: installing a buried pipe (40) within the installation pit;

s33: and backfilling the mounting pit.

4. The underground pipe construction method according to claim 3, wherein the S33 includes: backfilling with fine sand (50) in the vicinity of the buried pipe (40).

5. The underground pipe construction method according to claim 4, wherein the S33 further comprises: and backfilling sand (60) in the upper space of the buried pipe (40).

6. A method of underground construction according to claim 5 wherein the upper space of the underground pipe (40) is backfilled with graded sand.

7. The ground pipe construction method according to claim 2, wherein in the S40, the form (30) is removed before the secondary foundation pad (20 ') is poured for the ground pipe construction area, so that the secondary foundation pad (20') of the ground pipe construction area is integrated with the primary foundation pad (20) of the construction pit (10).

8. The underground pipe construction method according to claim 7, further comprising:

s50: laying a building foundation layer (70) on the primary foundation mat (20) and the secondary foundation mat (20').

9. The buried pipe construction method of claim 1, wherein in the S20, the area of the reserved buried pipe construction area is established according to the use requirement of installing buried pipes.

10. The buried pipe construction method of claim 1, wherein in the S30, installing buried pipes includes installing horizontal buried pipes and installing vertical buried pipes.

Technical Field

The invention relates to the technical field of ground source heat pumps, in particular to a buried pipe construction method suitable for building foundation operation.

Background

In recent years, with the increasingly prominent energy and environmental problems and the gradual implementation of energy conservation and emission reduction requirements, ground source heat pump systems are more and more widely applied. The ground source heat pump system takes rock and soil mass, stratum soil, underground water or surface water as a low-temperature heat source, and is a heat supply and air conditioning system consisting of a water (ground) source heat pump unit, a geothermal energy exchange system and a system in a building. According to different forms of geothermal energy exchange systems, the ground source heat pump system is divided into a buried pipe ground source heat pump system, a ground water ground source heat pump system and a surface water ground source heat pump system.

The ground source heat pump heating air-conditioning system mainly comprises three parts: the system comprises an outdoor ground source heat exchange system, a ground source heat pump host system and an indoor tail end system. The outdoor heat exchange system of the ground source heat pump system needs to be buried in underground soil, is limited by the green land conditions, and in order to implement the ground source heat pump system, a plurality of outdoor heat exchange systems need to be tightly combined with a building and buried under the foundation of the building, and after the construction site is leveled and the foundation cushion is poured, the construction of the vertical buried pipe and the horizontal connecting pipe is carried out and completed.

In the conventional implementation process of a ground source heat pump project, after the installation and implementation of a vertical buried pipe and a horizontal buried pipe under a building foundation are completed, the excavation of a pier foundation pit is carried out, repeated engineering quantities such as re-punching, pipe connection and the like are caused by the damage to the completed vertical buried pipe and the horizontal pipe of the ground source heat pump due to various reasons such as large-scale mechanical equipment operation errors, soft soil in rainy seasons and the like, the subsequent construction procedures such as foundation cushion pouring and the like are influenced, the construction cost is increased, the construction period is prolonged, and the occupation ratio of renewable energy sources in the project cold and heat source supply is reduced. Specifically, as shown in fig. 1 and 2, in the prior art, when pipeline installation of a ground source heat pump project is performed in a soil layer, a buried pipe installation space is excavated in the soil layer through steps S1 and S2, and the soil layer is backfilled after the buried pipe is installed. In the process of building foundation construction, if a column pier foundation pit is excavated in the steps S3 and S4, the buried pipe is easily damaged due to operation errors of large-scale mechanical equipment, and after the foundation pit is excavated, the soil layer at the position of the buried pipe is easily disturbed due to the influence of factors such as rainwater and the like, and the construction quality of the buried pipe is also easily reduced.

Disclosure of Invention

The invention mainly aims to provide a buried pipe construction method suitable for building foundation operation, and aims to solve the technical problems that buried pipes are easy to damage or construction quality of the buried pipes is influenced in ground source heat pump project construction in the prior art.

In order to achieve the above object, the present invention provides a buried pipe construction method suitable for building foundation work, the buried pipe construction method comprising: s10: excavating a building foundation pit in a soil layer; s20: carrying out primary foundation cushion layer pouring on the building foundation pit and reserving a buried pipe construction area; s30: constructing and installing the buried pipe in a buried pipe construction area; s40: and carrying out secondary foundation cushion pouring on the buried pipe construction area.

In one embodiment, at S20, a buried pipe construction area is reserved on the soil layer using a formwork envelope.

In one embodiment, S30 includes: s31: digging out an installation pit in a buried pipe construction area; s32: installing the buried pipe in the installation pit; s33: and backfilling the mounting pit.

In one embodiment, S33 includes: and carrying out fine sand backfilling near the buried pipe.

In one embodiment, S33 further includes: and backfilling sandstone in the upper space of the buried pipe.

In one embodiment, the upper space of the buried pipe is backfilled with graded sand.

In one embodiment, the formwork is removed before the secondary bedding layer of the buried pipe construction area is poured so that the secondary bedding layer of the buried pipe construction area is integrated with the primary bedding layer of the building pit at S40.

In one embodiment, the underground pipe construction method further comprises: s50: and laying a building foundation layer on the primary foundation cushion layer and the secondary foundation cushion layer.

In one embodiment, at S20, an area of the reserved buried pipe construction area is prepared according to the use requirement of the installation buried pipe.

In one embodiment, installing the buried pipe includes installing a horizontal buried pipe and installing a vertical buried pipe in S30.

By applying the technical scheme of the invention, before the buried pipe is installed in the soil layer, the building foundation pit is excavated, and the foundation cushion is poured once for the building foundation pit, so that the construction strength of the building foundation pit is ensured. In the process, a buried pipe construction area is reserved so as to facilitate construction and installation of the buried pipe in the buried pipe construction area. And finally, after the buried pipe is installed, secondary foundation cushion layer pouring is carried out on the buried pipe construction area, and the buried pipe construction of the building foundation operation area is completed. Compared with the prior art, the technical scheme of the invention can be used for operating on the building foundation to protect the buried pipe of the ground source heat pump and avoid being damaged in the excavation process of the building foundation pit; in addition, the primary foundation pad layer can also avoid the soil slope collapse of the pipe trench part of the buried pipe caused by the loose and soft soil in rainy season, and the disturbance to the soil layer is reduced. Therefore, the repeated work amount of re-punching, pipe connection and the like is reduced, the construction period is shortened, and the construction cost is saved.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary 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 and 2 are views illustrating steps of a ground pipe construction method for building foundation work in the prior art;

fig. 3 and 4 are views illustrating steps of the underground pipe construction method suitable for the construction foundation work according to the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments 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.

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

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.

In order to reduce the potential safety hazard of the underground pipe construction and ensure that the ground source heat pump system can stably operate for a long time, fig. 3 and 4 show an embodiment of the underground pipe construction method suitable for building foundation operation, which comprises the following steps:

s10: excavating a building foundation pit 10 in a soil layer;

s20: pouring a foundation cushion 20 for the building foundation pit 10 for the first time and reserving a buried pipe construction area;

s30: constructing and installing the buried pipe in a buried pipe construction area;

s40: and pouring a secondary foundation cushion layer 20' in the buried pipe construction area.

By applying the technical scheme of the invention, before the buried pipe is installed in the soil layer, the building foundation pit 10 is excavated, and the foundation cushion 20 is poured once for the building foundation pit 10, so that the construction strength of the building foundation pit 10 is ensured. In the process, a buried pipe construction area is reserved so as to facilitate construction and installation of the buried pipe in the buried pipe construction area. And finally, after the buried pipe is installed, pouring a secondary foundation cushion 20' in the buried pipe construction area to finish the buried pipe construction in the building foundation operation area. Compared with the prior art, the technical scheme of the invention can be used for protecting the buried pipe of the ground source heat pump during the construction foundation operation, and avoiding the damage of the buried pipe in the excavation process of the building foundation pit 10; in addition, the primary foundation mat 20 can also prevent the soil protection collapse of the pipe trench part of the buried pipe caused by the loose and soft soil in rainy season, and reduce the disturbance to the soil layer. Therefore, the repeated work amount of re-punching, pipe connection and the like is reduced, the construction period is shortened, and the construction cost is saved.

The soil layer is a general name of a construction layer for ground construction work in the construction foundation work, and the soil layer includes not only soil but also stratum components that may be involved in other construction works.

As a more preferable embodiment, as shown in fig. 3, at S20, the underground pipe construction area is prepared by enclosing the formwork 30 on the soil layer. The construction area of the buried pipe is reserved by enclosing through the template 30, so that the foundation cushion 20 can be prevented from pouring into the construction area of the buried pipe once, and the subsequent construction in the construction area of the buried pipe is prevented from being influenced. Optionally, in the technical solution of the present embodiment, the formwork 30 is a wood plate, and as another optional embodiment, an iron plate or an aluminum plate may also be used.

As shown in fig. 4, in the present embodiment, S30 includes:

s31: digging out an installation pit in a buried pipe construction area;

s32: installing the buried pipe 40 in the installation pit;

s33: and backfilling the mounting pit.

In this process, since the foundation bed 20 is once poured for the construction pit 10, the excavation process in the buried pipe construction area does not have a great influence on the construction pit 10. After the backfilling into the installation pit, a tamping process is required, and the tamping process needs to be careful about the tamping force to avoid damaging the installed buried pipe 40.

Optionally, in a basic solution of the present embodiment, S33 includes: fine sand 50 backfill is performed near the buried pipe 40. The fine sand 50 is backfilled near the buried pipe 40, so that a good heat transfer effect can be ensured, and the buried pipe 40 can be protected to a certain degree.

Preferably, in the technical solution of the present embodiment, S33 further includes: gravel 60 backfill is performed in the upper space of the buried pipe 40. The gravel 60 is used for backfilling, so that the bearing capacity of the layer where the gravel 60 is located can be improved, and the phenomenon that the layer where the gravel 60 is located is easily extruded and deformed to press the buried pipe 40 is avoided. More preferably, in the technical solution of the present embodiment, the upper space of the buried pipe 40 is backfilled with graded sand.

As shown in fig. 4, in the present embodiment, in S40, the form 30 is removed before the secondary foundation mat 20 'is poured into the underground pipe construction area, so that the secondary foundation mat 20' of the underground pipe construction area and the primary foundation mat 20 of the foundation pit 10 are integrated with each other, thereby improving the construction quality of the construction foundation work.

More preferably, in an embodiment of the present invention, as shown in fig. 4, the method for constructing a buried pipe further includes S50: a building foundation layer 70 is laid on the primary and secondary foundation mats 20 and 20'. Preferably, the building foundation 70 is a reinforced concrete structure.

In the technical solution of the present embodiment, fig. 3 and 4 only show the case of installing the horizontal buried pipe, and as another alternative embodiment, in S30, installing the buried pipe includes installing the horizontal buried pipe and installing the vertical buried pipe.

In the present embodiment, in S20, the area of the reserved buried pipe construction area is determined according to the use requirement of the installation buried pipe. Specifically, the construction area of the buried pipe can be planned according to the position, the width, the depth and the method of a horizontal pipe trench of the horizontal buried pipe.

From the above description, it can be seen that the method for constructing the buried pipe suitable for the building foundation operation provided by the invention can solve the problems that the excavation operation of the building foundation pit 10 easily causes the damage of the horizontal buried pipe and the installation vertical buried pipe of the ground source heat pump, and the disturbance influence of the deep laying of the horizontal buried pipe on the soil layer, and the like, is particularly suitable for project areas with high rainwater or projects with strict requirements on the construction period of the ground source heat pump, reduces the repeated engineering quantity of re-punching, pipe connection and the like, ensures the construction period, and saves the construction cost.

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.

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.

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.

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.