CN114033392A - Sedimentation control method applied to old village under water-rich sand layer shield - Google Patents
Sedimentation control method applied to old village under water-rich sand layer shield Download PDFInfo
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- CN114033392A CN114033392A CN202111351087.3A CN202111351087A CN114033392A CN 114033392 A CN114033392 A CN 114033392A CN 202111351087 A CN202111351087 A CN 202111351087A CN 114033392 A CN114033392 A CN 114033392A
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- construction
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- sand layer
- settlement
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000004576 sand Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004062 sedimentation Methods 0.000 title description 3
- 238000010276 construction Methods 0.000 claims abstract description 93
- 230000005641 tunneling Effects 0.000 claims abstract description 48
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 238000005086 pumping Methods 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 238000009412 basement excavation Methods 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the technical field of tunnel shield tunneling construction, in particular to a method for controlling settlement of old villages under a water-rich sand layer shield, which comprises the following steps: surveying the geological environment of an old village; evaluating the tunneling construction risk of the shield tunneling machine; thirdly, performing tunneling construction of the shield tunneling machine; step four, monitoring geological settlement; and fifthly, evaluating whether the construction environment meets the requirements according to the geological settlement monitoring result: when the construction environment meets the requirements, returning to the step three, and continuing the excavation construction of the shield machine; when the construction environment does not meet the requirements, the construction is suspended; and step six, when the construction environment does not meet the requirements and construction is suspended, carrying out water pumping and grouting treatment on a water-rich sand layer nearby the shield machine, pumping water in the sand layer, injecting slurry into the vacated area, circulating to the step four, and monitoring geological settlement again. The invention can effectively monitor geological settlement and timely control the settlement so as to meet the requirements of construction environment.
Description
Technical Field
The invention relates to the technical field of tunnel shield tunneling construction, in particular to a settlement control method applied to a water-rich sand layer shield under-penetration old villages.
Background
For the construction field of track and underground traffic, when old villages need to be worn down, because the building foundation and the building structure of the old villages generally use common brick-concrete materials and structures, when a shield machine is used for tunneling the underground of the old villages, the old villages are prone to settlement, house walls are prone to crack and even collapse, and personal and property safety of residents is harmed. Particularly, when the old village is located on the ground where a water-rich sand layer with strong water-rich property, loose structure and poor bonding capability is located, when a tunnel is constructed in the environment, the construction risk is higher, disastrous accidents such as collapse of sand collapse of the shield tunnel and the like are easily induced in the tunneling process of the shield machine, and the tunneling construction safety of tunnel excavation is seriously threatened.
Disclosure of Invention
The invention aims to provide a settlement control method applied to old villages under a water-rich sand layer shield, which can effectively monitor geological settlement and timely control the settlement so as to meet the requirements of construction environment, aiming at the problems in the background technology.
The technical scheme of the invention is that the settlement control method applied to the old village under the water-rich sand layer shield comprises the following steps:
surveying the geological environment of an old village;
evaluating the tunneling construction risk of the shield tunneling machine;
thirdly, performing tunneling construction of the shield tunneling machine;
step four, monitoring geological settlement;
and fifthly, evaluating whether the construction environment meets the requirements according to the geological settlement monitoring result:
when the construction environment meets the requirements, returning to the step three, and continuing the excavation construction of the shield machine;
when the construction environment does not meet the requirements, the construction is suspended;
and step six, when the construction environment does not meet the requirements and construction is suspended, carrying out water pumping and grouting treatment on a water-rich sand layer nearby the shield machine, pumping water in the sand layer, injecting slurry into the vacated area, circulating to the step four, and monitoring geological settlement again.
Preferably, between the third step and the fourth step, judging whether the shield machine completes construction, and if the shield machine completes excavation construction, stopping construction; and if the tunneling construction of the shield tunneling machine is not finished, continuing to perform the step four.
Preferably, the survey area for the geological environment of the old village includes the old village and the periphery of the old village extends outward by 50 meters.
Preferably, the type of survey of the geological environment includes geological composition, distribution and content of each geological composition.
Preferably, in the fourth step, the geological settlement monitoring system is used for detecting the geological settlement of old villages and comprises sensor terminals, monitoring base stations, a server, a central controller and an alarm, the sensor terminals are uniformly distributed in a surveying range and are in communication connection with the monitoring base stations, the monitoring base stations are in wireless communication connection with the server, the server is in communication connection with the central controller, the central controller is in control connection with the alarm, and a geological settlement alarm threshold is preset in the central controller.
Preferably, still include solar cell panel, solar cell panel sets up on the sensor terminal, and solar cell panel and sensor terminal electric connection.
Preferably, in the sixth step, the water pumping and grouting mode is as follows:
step S1, penetrating the grouting pipe into the sand layer, and pumping out water in the sand layer;
and step S2, injecting slurry into the sand layer through the slurry injection pipe by using a slurry injection pump.
Preferably, in the sixth step, the water pumping and grouting mode is as follows:
and (3) penetrating two grouting pipes into the sand layer, pumping water in the sand layer out by one grouting pipe, and simultaneously injecting slurry into the sand layer by the other grouting pipe.
Preferably, the end of the grouting pipe is plugged, a main through hole and an auxiliary through hole are formed in the circumferential surface of the grouting pipe, and the main through hole and the auxiliary through hole are uniformly formed in the grouting pipe.
Preferably, the edges of the main through hole and the auxiliary through hole are provided with chamfers.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention can effectively monitor geological settlement and timely control the settlement so as to meet the requirements of construction environment. Before construction, old villages on the water-rich sand layer ground and buildings in the surrounding range are investigated, and stratum distribution and content in underground environments of the old villages and the surrounding range are investigated so as to determine environmental conditions of shield tunneling construction. Therefore, the risk of the shield tunneling machine tunneling construction can be evaluated, when the risk exceeds the allowable range, the tunneling construction of the shield tunneling machine is stopped, the site is selected again to change the construction direction, or the old village is moved in different places; and when the risk is within the allowable range, carrying out the tunneling construction of the shield tunneling machine. Meanwhile, the geological settlement condition in the surveying range is monitored in real time, whether the construction environment meets the requirement of continuous construction or not is evaluated, and if the construction environment meets the requirement of continuous construction, the tunneling construction of the shield machine is continued; if the construction requirements cannot be met, suspending construction, carrying out pumping grouting treatment on the geological area which does not meet the construction requirements, pumping water in the water-rich sand layer to the extent that the construction environment meets the requirements, and injecting slurry into the vacated area. And when the geological settlement degree to be monitored again is in the allowable range, continuing the tunneling construction of the shield machine, thereby ensuring the tunneling construction efficiency and safety of the shield machine for penetrating the old villages in the water-rich sand layer.
Drawings
Fig. 1 is a schematic flow structure diagram of a method for controlling settlement of an old village under a water-rich sand layer shield;
fig. 2 is a flow chart of two water pumping and grouting modes in a sedimentation control method for a water-rich sand layer shield to pass through an old village downwards according to an embodiment of the invention;
fig. 3 is a cross-sectional view of a grouting pipe used for pumping and grouting in a method for controlling settlement of an old village under a water-rich sand layer shield.
Reference numerals: 1. a grouting pipe; 101. a main through hole; 102. and a secondary through hole.
Detailed Description
Example one
As shown in fig. 1-2, the method for controlling settlement of old villages under shield tunneling of water-rich sand layer, provided by the invention, comprises the following steps:
surveying the geological environment of an old village; the survey range of the geological environment of the old village comprises the old village and the periphery of the old village is extended outwards by 50 meters, and the survey is more comprehensive. The survey type of the geological environment comprises geological components, distribution and content of each geological component, so that the geological environment can be analyzed and evaluated fully.
And step two, evaluating the tunneling construction risk of the shield tunneling machine.
And step three, performing tunneling construction of the shield tunneling machine.
Judging whether the shield machine completes construction or not between the third step and the fourth step, and stopping construction if the shield machine completes excavation construction; and if the tunneling construction of the shield tunneling machine is not finished, continuing to perform the step four.
Step four, monitoring geological settlement; the geological settlement monitoring system comprises sensor terminals, monitoring base stations, a server, a central controller, an alarm and a solar cell panel, wherein a plurality of sensor terminals are uniformly distributed in a surveying range, the sensor terminals are in communication connection with the monitoring base stations to transmit geological settlement monitoring data, the monitoring base stations are in wireless communication connection with the server, the server is in communication connection with the central controller, the central controller is in control connection with the alarm, a geological settlement alarm threshold is preset in the central controller, and when the geological settlement exceeds the alarm threshold, the central controller controls the alarm to give an alarm so as to facilitate evacuation of residents and constructors, or a water-rich sand layer is processed so that the geological settlement degree is within an allowable range. Solar cell panel sets up on the sensor terminal, and solar cell panel and sensor terminal electric connection can supply power to the sensor terminal, and the environmental protection is practiced thrift more, and easily lays at survey within range.
And fifthly, evaluating whether the construction environment meets the requirements or not according to the geological settlement monitoring result.
And returning to the step three when the construction environment meets the requirements, and continuing the excavation construction of the shield machine.
And when the construction environment does not meet the requirements, suspending construction.
And step six, when the construction environment does not meet the requirements and construction is suspended, carrying out water pumping and grouting treatment on a water-rich sand layer nearby the shield machine, pumping water in the sand layer, injecting slurry into the vacated area, circulating to the step four, and monitoring geological settlement again.
This embodiment can effectual control geology subside and in time control subsides in order to reach the construction environment requirement. Before construction, old villages on the water-rich sand layer ground and buildings in the surrounding range are investigated, and stratum distribution and content in underground environments of the old villages and the surrounding range are investigated so as to determine environmental conditions of shield tunneling construction. Therefore, the risk of the shield tunneling machine tunneling construction can be evaluated, when the risk exceeds the allowable range, the tunneling construction of the shield tunneling machine is stopped, the site is selected again to change the construction direction, or the old village is moved in different places; and when the risk is within the allowable range, carrying out the tunneling construction of the shield tunneling machine. Meanwhile, the geological settlement condition in the surveying range is monitored in real time, whether the construction environment meets the requirement of continuous construction or not is evaluated, and if the construction environment meets the requirement of continuous construction, the tunneling construction of the shield machine is continued; if the construction requirements cannot be met, suspending construction, carrying out pumping grouting treatment on the geological area which does not meet the construction requirements, pumping water in the water-rich sand layer to the extent that the construction environment meets the requirements, and injecting slurry into the vacated area. And when the geological settlement degree to be monitored again is in the allowable range, continuing the tunneling construction of the shield machine, thereby ensuring the tunneling construction efficiency and safety of the shield machine for penetrating the old villages in the water-rich sand layer.
Example two
Compared with the first embodiment, in the present embodiment, as shown in fig. 2 to 3, the water pumping and grouting method in the sixth step is as follows:
the first mode is as follows: step S1, penetrating the grouting pipe 1 into a sand layer, and pumping out water in the sand layer;
and step S2, injecting slurry into the sand layer through the slurry injection pipe 1 by using a slurry injection pump.
The first mode belongs to and draws water and slip casting processing by stage, can use one set of equipment to go on, and construction cost is low.
The second mode is as follows: two grouting pipes 1 are inserted into the sand layer, and when one grouting pipe 1 pumps out water in the sand layer, the other grouting pipe 1 is used for injecting slurry into the sand layer. This kind of mode belongs to the drawing water and carries out simultaneously with the slip casting, uses two sets of equipment, and the efficiency of construction is high.
The end part of the grouting pipe 1 is plugged, a main through hole 101 and an auxiliary through hole 102 are arranged on the circumferential surface of the grouting pipe 1, and the main through hole 101 and the auxiliary through hole 102 are uniformly arranged on the grouting pipe 1. Chamfers are arranged at the edges of the main through hole 101 and the auxiliary through hole 102. When grouting is performed through the grouting pipe 1, the size of the main through hole 101 is larger than that of the auxiliary through hole 102, the speed of the mud sprayed out of the main through hole 101 is smaller than that of the mud sprayed out of the auxiliary through hole 102, the distance and the depth of the mud sprayed out of the main through hole 101 are smaller than those of the mud sprayed out of the auxiliary through hole 102, grouting processing is performed on different distances and depths, and the grouting range is more comprehensive.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The method for controlling the settlement of old villages under the shield of the water-rich sand layer is characterized by comprising the following steps of:
surveying the geological environment of an old village;
evaluating the tunneling construction risk of the shield tunneling machine;
thirdly, performing tunneling construction of the shield tunneling machine;
step four, monitoring geological settlement;
and fifthly, evaluating whether the construction environment meets the requirements according to the geological settlement monitoring result:
when the construction environment meets the requirements, returning to the step three, and continuing the excavation construction of the shield machine;
when the construction environment does not meet the requirements, the construction is suspended;
and step six, when the construction environment does not meet the requirements and construction is suspended, carrying out water pumping and grouting treatment on a water-rich sand layer nearby the shield machine, pumping water in the sand layer, injecting slurry into the vacated area, circulating to the step four, and monitoring geological settlement again.
2. The method for controlling the settlement of the old village under the shield applied to the water-rich sand layer is characterized in that whether the shield machine completes construction or not is judged between the third step and the fourth step, and if the shield machine completes excavation construction, the construction is stopped; and if the tunneling construction of the shield tunneling machine is not finished, continuing to perform the step four.
3. The method for controlling the settlement of the old villages under the shield in the water-rich sand layer is applied to the shield, according to claim 1, wherein the survey range of the geological environment of the old villages comprises the old villages and the peripheries of the old villages are extended outwards by 50 meters.
4. The method for controlling the settlement of the old village under the shield of the water-rich sand layer according to claim 3, wherein the survey type of the geological environment comprises geological components, distribution and content of the geological components.
5. The method for controlling the settlement of the old village under the shield in the water-rich sand layer is characterized in that in the fourth step, a geological settlement monitoring system is used for detecting the geological settlement of the old village, the geological settlement monitoring system comprises a sensor terminal, a monitoring base station, a server, a central controller and an alarm, the sensor terminal is uniformly distributed in a surveying range, the sensor terminal is in communication connection with the monitoring base station, the monitoring base station is in wireless communication connection with the server, the server is in communication connection with the central controller, the central controller is in control connection with the alarm, and a geological settlement alarm threshold is preset in the central controller.
6. The method for controlling the settlement of the old village under the shield of the water-rich sand layer according to claim 5, further comprising a solar panel, wherein the solar panel is arranged on the sensor terminal and is electrically connected with the sensor terminal.
7. The method for controlling the settlement of the old village under the shield in the water-rich sand layer according to claim 1, wherein in the sixth step, the water pumping and grouting mode is as follows:
step S1, penetrating the grouting pipe (1) into a sand layer, and pumping water out of the sand layer;
and step S2, injecting slurry into the sand layer through the slurry injection pipe (1) by using a slurry injection pump.
8. The method for controlling the settlement of the old village under the shield in the water-rich sand layer according to claim 1, wherein in the sixth step, the water pumping and grouting mode is as follows:
two grouting pipes (1) penetrate into the sand layer, one grouting pipe (1) pumps water in the sand layer, and the other grouting pipe (1) is used for injecting slurry into the sand layer.
9. The method for controlling the settlement of the old village which is passed through under the shield of the water-rich sand layer is applied to the shield according to the claim 7 or 8, characterized in that the end part of the grouting pipe (1) is blocked, the circumferential surface of the grouting pipe (1) is provided with a main through hole (101) and a plurality of auxiliary through holes (102), and the main through holes (101) and the auxiliary through holes (102) are uniformly arranged on the grouting pipe (1).
10. The method for controlling the settlement of the old village under the shield tunnel in the water-rich sand layer according to claim 9, wherein the edges of the main through hole (101) and the auxiliary through hole (102) are provided with chamfers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351087.3A CN114033392A (en) | 2021-11-16 | 2021-11-16 | Sedimentation control method applied to old village under water-rich sand layer shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351087.3A CN114033392A (en) | 2021-11-16 | 2021-11-16 | Sedimentation control method applied to old village under water-rich sand layer shield |
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| Publication Number | Publication Date |
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| CN114033392A true CN114033392A (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111351087.3A Pending CN114033392A (en) | 2021-11-16 | 2021-11-16 | Sedimentation control method applied to old village under water-rich sand layer shield |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090028097A (en) * | 2007-09-14 | 2009-03-18 | 성보건설 주식회사 | Grouting apparatus for reinforcement |
| CN204401624U (en) * | 2015-01-09 | 2015-06-17 | 曹世贵 | Grouting Pipe |
| CN204827466U (en) * | 2015-04-09 | 2015-12-02 | 深圳市永鑫建筑工程集团有限公司 | Undercut tunnel ultra -deep hole slip casting is with sleeve valve pipe |
| CN109696151A (en) * | 2019-01-23 | 2019-04-30 | 北京市燃气集团有限责任公司 | Geology sedimentation monitoring system and method |
| CN209637774U (en) * | 2019-02-22 | 2019-11-15 | 中铁十一局集团城市轨道工程有限公司 | A kind of duct pieces of shield tunnel grouting device |
| CN211171990U (en) * | 2019-10-15 | 2020-08-04 | 成都健茂科技有限公司 | Grouting pipe for filling foundation |
| CN112576265A (en) * | 2020-11-30 | 2021-03-30 | 中建八局轨道交通建设有限公司 | Sedimentation control method for old villages penetrated by shield |
| CN112576256A (en) * | 2020-11-30 | 2021-03-30 | 中建八局轨道交通建设有限公司 | Construction method for full-section penetration of middle sand and pebble bed by shield |
-
2021
- 2021-11-16 CN CN202111351087.3A patent/CN114033392A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090028097A (en) * | 2007-09-14 | 2009-03-18 | 성보건설 주식회사 | Grouting apparatus for reinforcement |
| CN204401624U (en) * | 2015-01-09 | 2015-06-17 | 曹世贵 | Grouting Pipe |
| CN204827466U (en) * | 2015-04-09 | 2015-12-02 | 深圳市永鑫建筑工程集团有限公司 | Undercut tunnel ultra -deep hole slip casting is with sleeve valve pipe |
| CN109696151A (en) * | 2019-01-23 | 2019-04-30 | 北京市燃气集团有限责任公司 | Geology sedimentation monitoring system and method |
| CN209637774U (en) * | 2019-02-22 | 2019-11-15 | 中铁十一局集团城市轨道工程有限公司 | A kind of duct pieces of shield tunnel grouting device |
| CN211171990U (en) * | 2019-10-15 | 2020-08-04 | 成都健茂科技有限公司 | Grouting pipe for filling foundation |
| CN112576265A (en) * | 2020-11-30 | 2021-03-30 | 中建八局轨道交通建设有限公司 | Sedimentation control method for old villages penetrated by shield |
| CN112576256A (en) * | 2020-11-30 | 2021-03-30 | 中建八局轨道交通建设有限公司 | Construction method for full-section penetration of middle sand and pebble bed by shield |
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