CN110185046B - Ground source well-digging horizontal connecting pipe construction method - Google Patents
Ground source well-digging horizontal connecting pipe construction method Download PDFInfo
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- CN110185046B CN110185046B CN201910495408.3A CN201910495408A CN110185046B CN 110185046 B CN110185046 B CN 110185046B CN 201910495408 A CN201910495408 A CN 201910495408A CN 110185046 B CN110185046 B CN 110185046B
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- pipe
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- branch pipe
- ditches
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- 238000010276 construction Methods 0.000 title claims abstract description 28
- 230000002706 hydrostatic effect Effects 0.000 claims description 18
- 239000004576 sand Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 2
- 238000000034 method Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/12—Obtaining and confining water by means of wells by means of vertical pipe wells
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/15—Keeping wells in good condition, e.g. by cleaning, repairing, regenerating; Maintaining or enlarging the capacity of wells or water-bearing layers
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/003—Arrangement for testing of watertightness of water supply conduits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention provides a ground source well-digging horizontal connecting pipe construction method, which is completed by prefabricating a horizontal pipe and a branch pipe within 30m from the periphery of a foundation pit in a storehouse, placing the prefabricated horizontal pipe and the prefabricated branch pipe into a pipe trench after the pipe trench is excavated, quickly backfilling the pipe trench and pouring a cushion layer, so that the exposure time of the foundation pit at the edge can be greatly shortened, and the safety of the foundation pit can be guaranteed. Like this, horizontal pipe and branch pipe are prefabricated in the storehouse, can reduce construction step and operating time in the foundation ditch, and main trench is in time backfilled and is carried out the integral type and pour, effectively guarantees foundation ditch safety.
Description
Technical Field
The invention relates to a ground source well drilling method, in particular to a horizontal connecting pipe construction method for ground source well drilling.
Background
When the ground source well digging technology under the garage is adopted, the vertical buried pipe is connected with the horizontal pipe, a foundation pit needs to be excavated in a large area, the vertical buried pipe needs to be subjected to pipeline flushing and hydrostatic test before being connected with the horizontal pipe, and the hydrostatic test needs to be carried out again after the connection is completed.
The traditional method is that after a foundation pit is excavated, vertical pipe burying flushing and a hydraulic test are firstly carried out, then horizontal pipeline connection and the hydraulic test are carried out, then pipe ditches are backfilled, and finally a cushion layer is poured.
The cushion layer can be poured after a long period of time after the foundation pit is excavated according to the traditional method, so that the exposure time of the foundation pit is long, and the foundation pit collapses.
Disclosure of Invention
The invention provides a horizontal pipe connecting construction method for ground source well drilling, which is used for avoiding the occurrence of foundation pit collapse risks and adopts the following technical scheme:
a horizontal connecting pipe construction method for ground source well drilling comprises the following steps:
s1: finding and marking the vertical buried pipe, excavating branch pipe ditches, horizontal pipe ditches and horizontal pipe collecting pipe ditches according to a ground source well digging construction drawing when the foundation pit is excavated to a set depth, and excavating square holes of 1m multiplied by 1m at the vertical buried pipe part, wherein the depth is the same as that of the branch pipe ditches;
s2: prefabricating a horizontal pipe and a branch pipe according to the site excavation size in a storehouse, carrying out hot melting and sealing on the pipe head of the branch pipe, then carrying out a hydrostatic test to test the connection quality of the branch pipe and the horizontal pipe, and finally carrying out pressure maintaining on a pipeline until the pouring of the integrated cushion layer is finished;
s3: transporting the finished products of the horizontal pipe and the branch pipe with pressure maintaining to the site, placing the finished products into a horizontal pipe ditch and a branch pipe ditch, and backfilling the branch pipe ditch and the horizontal pipe ditch, wherein the square hole is not backfilled;
s4: the part of the foundation pit which is not ditched, the branch pipe ditches and the horizontal pipe ditches which are backfilled and the horizontal pipe collecting pipe ditches which are not backfilled are subjected to integrated cushion layer pouring, the horizontal pipes are decompressed after the integrated cushion layer pouring is finished, and pipe heads of the horizontal pipes are plugged by pipe caps;
s5: washing and carrying out hydrostatic test on the vertical buried pipe in a square hole of 1m multiplied by 1m, and then cutting off a sealing pipe head of a branch pipe to be connected with the vertical buried pipe;
s6: after the vertical buried pipe is connected with the branch pipe, carrying out a horizontal connecting pipe hydrostatic test, and after the hydrostatic test is qualified, constructing the horizontal pipe from a horizontal pipe collecting pipe ditch to a ground source water collecting and distributing device;
s7: and carrying out integral hydrostatic test on the ground source buried pipe loop from the ground source water distributing and collecting device, maintaining the pressure of the pipeline after the hydrostatic test is qualified until the pipeline is connected with the water distributing and collecting device, then backfilling the collecting pipe ditch and the square hole of the horizontal pipe, and carrying out cushion layer supplementary pouring.
Further, in step S3, one end of the horizontal tube located in the horizontal tube collecting trench is sealed by a cap.
Further, in step S3 and step S7, the fine sand is first backfilled and tamped during backfilling, and graded sand is then backfilled above the fine sand, wherein the densification coefficient of the graded sand is 0.96.
Further, when the ground source heat pump horizontal connecting pipe construction is carried out on the foundation pit with the collapse risk, the invention is applied to the horizontal connecting pipe construction within the range of 30m around the foundation pit.
The ground source well digging horizontal connecting pipe construction method is completed by prefabricating the horizontal pipes and the branch pipes within 30m from the periphery of the foundation pit in a storehouse, placing the prefabricated horizontal pipes and the prefabricated branch pipes into the pipe trench after the pipe trench is excavated, quickly backfilling the pipe trench and pouring a cushion layer, so that the exposure time of the edge foundation pit can be greatly shortened, and the safety of the foundation pit is guaranteed. Like this, horizontal pipe and branch pipe are prefabricated in the storehouse, can reduce construction step and operating time in the foundation ditch, and main trench is in time backfilled and is carried out the integral type and pour, effectively guarantees foundation ditch safety.
Drawings
FIG. 1 is a schematic diagram comparing new construction zone and old construction zone;
FIG. 2 is a plan view of a pipe trench and a ground source buried pipe;
FIG. 3 is a cross-sectional view of the integrated cushion of the horizontal trench and the collecting trench;
FIG. 4 is a cross-sectional view of a channel layer of a horizontal tube collection tube.
Detailed Description
As shown in fig. 1, the construction area of the conventional method is an area a, the construction area of the new method adopted by the invention is an area B, when the horizontal connecting pipe of the ground source heat pump is constructed for the foundation pit with the risk of collapse, the horizontal connecting pipe within 30m of the periphery of the foundation pit is constructed according to the new method, and the central area of the foundation pit is still constructed according to the conventional method.
The construction steps of the invention are as follows:
the method comprises the following steps: finding and marking a vertical buried pipe 2, as shown in figure 2, excavating a branch pipe ditch 5, a horizontal pipe ditch 4 and a horizontal pipe collecting pipe ditch 1 when a foundation pit is excavated to a design depth (the specific depth is determined according to project design requirements), wherein the excavation position and depth are determined according to construction drawings, a square hole 6 with the depth of 1m multiplied by 1m is reserved at the vertical buried pipe 2, and the depth of the square hole is as deep as that of the branch pipe ditch;
step two: prefabricating a horizontal pipe 3 and a branch pipe 7 according to the field excavation size in a storehouse, and performing a hydrostatic test;
step three: transporting the finished products of the horizontal pipes 3 and the branch pipes 7 to the site, placing the finished products into corresponding pipe ditches, backfilling the corresponding branch pipe ditches 5 and the horizontal pipe ditches 4, and not backfilling the square holes of 1m multiplied by 1 m; as shown in fig. 3, after the integral cushion layer is poured, the pressure of the horizontal pipe is released, and the pipe head of the horizontal pipe is plugged by using a pipe cap, and at the moment, the horizontal pipe 3 is plugged by using a pipe cap 9; during backfilling, the horizontal pipe is backfilled by fine sand 11 and tamped, graded sandstone 10 is backfilled above the fine sand 11, and the compaction coefficient of the graded sandstone 10 is 0.96;
step four: the part of the foundation pit which is not dug is poured with an integrated cushion layer 8 together with the branch pipe ditches 5 and the horizontal pipe ditches which are backfilled and the horizontal pipe collecting pipe ditches 1 which are not backfilled;
step five: the vertical buried pipe 2 is flushed and subjected to hydrostatic test in a square hole with the diameter of 1m multiplied by 1m, and then is connected with the branch pipe 7;
step six: after the vertical buried pipe 2 is connected with the branch pipe 7, carrying out a horizontal connecting pipe hydrostatic test, and after the hydrostatic test is qualified, constructing the horizontal pipe 3 from the horizontal pipe collecting pipe ditch 1 to the ground source water collecting and distributing device;
step seven: and (3) carrying out an integral hydraulic test on the ground source buried pipe loop from the ground source water distributing and collecting device, and backfilling the horizontal pipe collecting pipe ditch 1 and the square hole 6 with the diameter of 1m multiplied by 1m and carrying out cushion supplementary pouring by using a supplementary cushion 12 after the hydraulic test is qualified as shown in figure 4.
The ground source well digging horizontal connecting pipe construction method is completed by prefabricating the horizontal pipes and the branch pipes within 30m from the periphery of the foundation pit in a storehouse, placing the prefabricated horizontal pipes and the prefabricated branch pipes into the pipe trench after the pipe trench is excavated, quickly backfilling the pipe trench and pouring a cushion layer, so that the exposure time of the edge foundation pit can be greatly shortened, and the safety of the foundation pit is guaranteed. Like this, horizontal pipe and branch pipe are prefabricated in the storehouse, can reduce construction step and operating time in the foundation ditch, and main trench is in time backfilled and is carried out the integral type and pour, effectively guarantees foundation ditch safety.
Claims (4)
1. A horizontal connecting pipe construction method for ground source well drilling comprises the following steps:
s1: finding and marking the vertical buried pipe, excavating branch pipe ditches, horizontal pipe ditches and horizontal pipe collecting pipe ditches according to a ground source well digging construction drawing when the foundation pit is excavated to a set depth, and excavating square holes of 1m multiplied by 1m at the vertical buried pipe part, wherein the depth is the same as that of the branch pipe ditches;
s2: prefabricating a horizontal pipe and a branch pipe according to the site excavation size in a storehouse, carrying out hot melting and sealing on the pipe head of the branch pipe, then carrying out a hydrostatic test to test the connection quality of the branch pipe and the horizontal pipe, and finally carrying out pressure maintaining on a pipeline until the pouring of the integrated cushion layer is finished;
s3: transporting the finished products of the horizontal pipe and the branch pipe with pressure maintaining to the site, placing the finished products into a horizontal pipe ditch and a branch pipe ditch, and backfilling the branch pipe ditch and the horizontal pipe ditch, wherein the square hole is not backfilled;
s4: the part of the foundation pit which is not ditched, the branch pipe ditches and the horizontal pipe ditches which are backfilled and the horizontal pipe collecting pipe ditches which are not backfilled are subjected to integrated cushion layer pouring, the horizontal pipes are decompressed after the integrated cushion layer pouring is finished, and pipe heads of the horizontal pipes are plugged by pipe caps;
s5: washing and carrying out hydrostatic test on the vertical buried pipe in a square hole of 1m multiplied by 1m, and then cutting off a sealing pipe head of a branch pipe to be connected with the vertical buried pipe;
s6: after the vertical buried pipe is connected with the branch pipe, carrying out a horizontal connecting pipe hydrostatic test, and after the hydrostatic test is qualified, constructing the horizontal pipe from a horizontal pipe collecting pipe ditch to a ground source water collecting and distributing device;
s7: and carrying out integral hydrostatic test on the ground source buried pipe loop from the ground source water distributing and collecting device, maintaining the pressure of the pipeline after the hydrostatic test is qualified until the pipeline is connected with the water distributing and collecting device, then backfilling the collecting pipe ditch and the square hole of the horizontal pipe, and carrying out cushion layer supplementary pouring.
2. The ground source well-digging horizontal pipe connecting construction method according to claim 1, characterized in that: in step S3, one end of the horizontal tube located in the horizontal tube collecting trench is plugged by a cap.
3. The ground source well-digging horizontal pipe connecting construction method according to claim 1, characterized in that: in the steps S3 and S7, fine sand is firstly used for backfilling and tamping during backfilling, and graded sand stone is used for backfilling above the fine sand, wherein the compaction coefficient of the graded sand stone is 0.96.
4. The ground source well-digging horizontal pipe connecting construction method according to claim 1, characterized in that: when the ground source heat pump horizontal connecting pipe construction is carried out on the foundation pit with the collapse risk, the ground source well digging horizontal connecting pipe construction method is applied to the horizontal connecting pipe construction within the range of 30m around the foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495408.3A CN110185046B (en) | 2019-06-10 | 2019-06-10 | Ground source well-digging horizontal connecting pipe construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495408.3A CN110185046B (en) | 2019-06-10 | 2019-06-10 | Ground source well-digging horizontal connecting pipe construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110185046A CN110185046A (en) | 2019-08-30 |
| CN110185046B true CN110185046B (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910495408.3A Expired - Fee Related CN110185046B (en) | 2019-06-10 | 2019-06-10 | Ground source well-digging horizontal connecting pipe construction method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113638433B (en) * | 2021-06-29 | 2023-03-14 | 中铁电气化局集团北京建筑工程有限公司 | Construction method for foundation raft penetrating through ground source side circulating pipe of ground source heat pump system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6085113B2 (en) * | 2012-08-02 | 2017-02-22 | 三谷セキサン株式会社 | Method of burying underground heat exchange pipe, propulsion tool for burial |
| CN103016842B (en) * | 2012-12-13 | 2015-08-05 | 浙江环宇建设集团有限公司 | Mud soft soil foundation earth source heat pump direct-burried heat exchanger reverse construction engineering method |
| KR20160053016A (en) * | 2014-10-30 | 2016-05-13 | 한국해양과학기술원 | Backfiling method for heat pipe |
| KR20160070865A (en) * | 2014-12-10 | 2016-06-21 | 한국해양과학기술원 | Backfiling method for heat pipe |
| CN109667540A (en) * | 2018-12-14 | 2019-04-23 | 天津美意机电设备工程有限公司 | A kind of constructing ground source heat pump well process |
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