CN114183151A - Device for compensating ground settlement - Google Patents
Device for compensating ground settlement Download PDFInfo
- Publication number
- CN114183151A CN114183151A CN202111451604.4A CN202111451604A CN114183151A CN 114183151 A CN114183151 A CN 114183151A CN 202111451604 A CN202111451604 A CN 202111451604A CN 114183151 A CN114183151 A CN 114183151A
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- Prior art keywords
- oil cylinder
- pressure
- compensating
- elevating system
- lifting
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- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 239000002689 soil Substances 0.000 claims abstract description 14
- 230000003028 elevating effect Effects 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims 1
- 230000005641 tunneling Effects 0.000 abstract description 32
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 12
- 239000003921 oil Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
Abstract
The invention relates to the technical field of shield tunneling, in particular to a device for compensating ground settlement, which comprises a lifting mechanism, a sensing mechanism and a control mechanism, wherein the lifting mechanism is arranged in soil below a running track, the sensing mechanism is arranged between the lifting mechanism and the running track and is used for sensing the pressure received by the lifting mechanism from the running track, and the control mechanism is used for controlling the lifting mechanism to lift according to the pressure received by the sensing mechanism, so that the problem of ground surface settlement caused by a shield tunneling machine in the process of tunneling and excavating is solved.
Description
Technical Field
The invention relates to the technical field of shield tunneling, in particular to a device for compensating ground settlement.
Background
With the spreading of the shield tunneling technology in the urban tunnel excavation process, the situation of crossing train track groups is inevitable in the shield method construction process. However, when the shield tunneling machine tunnels through the train track, the ground settlement below the existing train track is difficult to predict and control, if the existing railway is not protected, the inclination and deformation of the train track are likely to be caused, and if the settlement range is too large, the track is even broken when the vehicle passes through, and finally the track is stopped.
In the shield tunneling and excavating process, factors causing the ground surface to subside are various, for example, (1) when the shield tunneling machine tunnels in a tunnel, water pressure and soil pressure of an excavation surface are unbalanced with pressure of a pressure cabin due to the fact that propelling quantity and soil discharging quantity are different, so that the excavation surface loses balance, and thus foundation deformation occurs; (2) in the shield construction process, due to continuous friction between a shell plate of the shield and surrounding rocks, the surrounding rocks are disturbed, so that the foundation sinks, and particularly, overexcavation is generated during shield curve tunneling; (3) the shield tail generates a gap and the grouting behind the wall is insufficient, and the shield tail generates a gap in shield construction, so that the surrounding rock supported by the shield shell deforms towards the tail part to make the foundation collapse downwards, which is the elastic-plastic deformation caused by stress release. The size of the foundation subsidence is influenced by the material quality of the grouting material after the wall and the injection time, position, pressure, quantity and the like; (4) in the shield construction process, because bolts of some joints are not fastened firmly, a segment ring of the joint is deformed, the actual amount of a gap of a shield tail is increased, and the lining is deformed or displaced due to uneven external pressure after the segment is separated from the shield tail, so that the foundation subsidence is increased; (5) in the construction process, when water gushes at the open face or water leakage is generated in the primary lining, the underground water level is reduced to cause foundation sinking. This phenomenon is due to consolidation settlement caused by the increase in the effective stress of the foundation.
Due to the fact that the factors causing ground settlement are too many, ground settlement is easy to occur in the shield tunneling process, and a series of problems are caused. The existing method for controlling the ground surface settlement in the shield tunneling process is generally a construction method for standardizing shield tunneling, such as controlling tunneling speed, controlling soil pressure bin, controlling grouting pressure, grouting amount and the like; the interference to surrounding rocks is reduced as much as possible in the construction process, and the overbreak is reduced as much as possible; and strictly controlling the underground water level and the like during shield tunneling.
In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.
Disclosure of Invention
The invention aims to solve the problem of surface subsidence caused by a shield tunneling machine in the process of tunneling and excavating, and provides a device for compensating for the surface subsidence.
In order to achieve the purpose, the invention discloses a device for compensating ground settlement, which comprises a lifting mechanism, a pressure sensor and a controller, wherein the lifting mechanism is arranged in soil below a running track, the pressure sensor is arranged between the lifting mechanism and the running track and is used for sensing the pressure received by the lifting mechanism from the running track, and the controller is used for controlling the lifting mechanism to lift according to the pressure received by the sensing mechanism.
The lifting mechanism comprises a lifting rod, a push rod, a large oil cylinder, a small oil cylinder, a thread turn, a threaded hole and a piston, wherein the push rod is arranged below the lifting rod, the lower part of the push rod is arranged in the large oil cylinder, the small oil cylinder is arranged on one side of the large oil cylinder, the threaded hole is arranged on the upper part of the small oil cylinder, the thread turn passes through the threaded hole to be connected with the small oil cylinder, and the piston is arranged at the lower end of the thread turn.
The pressure sensor is positioned at the upper part of the lifting rod.
The controller is internally provided with a rotating machine, and the rotating machine is connected with the thread rotating head through a transmission gear.
A base plate is arranged below the lifting mechanism, a baffle is arranged on the base plate, and the baffle is located around the lifting mechanism.
Compared with the prior art, the invention has the beneficial effects that:
1. the damage caused by ground settlement can be effectively controlled, and the inclination and deformation of the train track can be prevented;
2. by means of upward jacking of the lifting rod, the settled ground surface can be compensated more quickly and conveniently, and the stability of the train track is improved, so that the train can more safely tunnel through the shield tunneling machine;
3. the pressure sensor at the top of the lifting rod can realize the automatic lifting of the lifting rod, and does not need to detect and overhaul the train track in real time;
4. the increased base plate can effectively increase the contact area between the hydraulic lifting rod and the soil body, reduce the pressure intensity and further reduce the sinking of the lifting rod in the soil body due to the stress.
Drawings
FIG. 1 is a schematic perspective view of a tunneling section of a train shield tunneling machine according to the present invention;
FIG. 2 is a top view of the tunneling section of the train shield tunneling machine according to the present invention;
FIG. 3 is a front view (in partial section) of the tunnel section of the train shield tunneling machine of the present invention;
FIG. 4 is a schematic view of the lifting rod of the tunneling section of the shield tunneling machine of the train according to the present invention;
FIG. 5 is a structure diagram of a lifting rod of a tunneling section of a shield tunneling machine of a train according to the invention;
FIG. 6 is a structural diagram of a control mechanism of a tunneling section of a train shield tunneling machine according to the invention;
the figures in the drawings represent:
1-train running track; 2-train; 3-soil body; 4-a control mechanism; 5-a hydraulic lifting rod; 6-a pressure sensor; 7-a backing plate; 8-antiskid baffle; 9-a top rod; 10-large oil cylinder; 11-a small oil cylinder; 12-turning of the thread; 13-a threaded hole; 14-a piston; 15-a controller; 16-a transmission gear; 17-rotating the machine.
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
The embodiment provides a compensate device that ground subsides, including elevating system 5, response mechanism 6, control mechanism 4, elevating system locates in the soil body of orbit 1 below, response mechanism 6 locates between elevating system 5 and the train track 1 for the pressure that comes from the train track that response elevating system received, control mechanism is used for controlling elevating system lift according to the pressure that response mechanism received.
In this embodiment, the lifting mechanism includes a hydraulic lifting rod, the sensing mechanism includes a pressure sensor, and the pressure sensor is connected with the control mechanism.
The lifting mechanism 5 mainly carries out vertical hydraulic lifting to offset the settlement of soil body; the pressure sensor 6 is mainly used for sinking together with the whole lifting mechanism when the ground subsides, so that the sensing mechanism is separated from the contact with the train track, and the most direct feedback of the separation of the sensing mechanism from the contact is that the pressure borne by the pressure sensor is zero; the control mechanism 4 obtains the information that the pressure fed back by the pressure sensor 6 is zero, thereby judging that the lifting device is separated from the train track, and judging whether the hydraulic lifting rod needs to be lifted or not according to the information. When it is judged that the rise is necessary, the controller 15 activates the rotary machine 17 therein, so that the rotary machine 17 is rotated. The rotary machine 17 is connected with the thread rotary head 12 through a transmission gear 16, when the rotary machine rotates, the thread rotary head 12 rotates and descends through a threaded hole 13 through the transmission gear 16, the piston 14 is pressed downwards, the piston 14 compresses hydraulic oil in the small oil cylinder 11 to the large oil cylinder 10, hydraulic oil in the large oil cylinder 10 is increased, and the ejector rod 9 is made to ascend. Thereby controlling the lifting rod 5 to ascend, and stopping ascending when the pressure of the pressure sensor is non-zero.
In this embodiment, a base plate 7 is arranged below the lifting mechanism, a baffle 8 is arranged on the base plate 7, and the baffle is located around the lifting mechanism. The baffle plate 8 is mainly used for preventing the lifting device from sliding when ascending or descending in the ground; the base plate 7 is mainly used for increasing the contact area of the lifting device and the soil body and reducing the pressure.
The method comprises the steps of simulating and predicting in advance which areas may cause settlement when a shield tunneling machine passes through a train track 1 in the tunneling process, burying a hydraulic lifting rod 5 capable of automatically lifting according to pressure in advance in soil 3 below the train track which may cause settlement, and tunneling the shield tunneling machine below the train track to possibly cause ground settlement. Then, the pressure sensor 6 is combined with the hydraulic lifting rod 5, when the soil body 3 is settled, the train track 1 is separated from the hydraulic lifting rod 5, the pressure sensor 6 senses that the pressure value is zero, and then the electric control device 4 controls the hydraulic lifting rod 5 to ascend until the pressure sensed by the pressure sensor 6 is larger than zero.
Different from the situation that the ground subsides and collapses, the ground subsides occur within a period of time, so that the monitoring and measuring data can be used in different embodiments to judge the subsided area under the train track, and then the lifting device is buried in the subsided area.
The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The utility model provides a compensate device that ground subsides, its characterized in that includes elevating system, pressure-sensitive device, controller, elevating system locates in the orbit below soil body, pressure-sensitive device locates between elevating system and the orbit for the pressure that comes from the orbit that elevating system received, the controller is used for controlling elevating system lift according to the pressure that induction mechanism received.
2. The device for compensating for ground settlement of claim 1, wherein the lifting mechanism comprises a lifting rod, a push rod, a large oil cylinder, a small oil cylinder, a threaded swivel, a threaded hole and a piston, the push rod is arranged below the lifting rod, the lower part of the push rod is arranged in the large oil cylinder, the small oil cylinder is arranged on one side of the large oil cylinder, the threaded hole is arranged on the upper part of the small oil cylinder, the threaded swivel is connected with the small oil cylinder through the threaded hole, and the piston is arranged at the lower end of the threaded swivel.
3. An apparatus for compensating for ground settlement as claimed in claim 2, wherein the pressure sensor is located at an upper portion of the elevating bar.
4. A device for compensating for floor subsidence as in claim 2 wherein a rotator is provided in the controller, the rotator being connected to the threaded rotator by a drive gear.
5. A device for compensating for floor subsidence as in claim 1 wherein a backing plate is positioned below the elevator mechanism, and a baffle is positioned around the elevator mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111451604.4A CN114183151A (en) | 2021-12-01 | 2021-12-01 | Device for compensating ground settlement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111451604.4A CN114183151A (en) | 2021-12-01 | 2021-12-01 | Device for compensating ground settlement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114183151A true CN114183151A (en) | 2022-03-15 |
Family
ID=80540998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111451604.4A Pending CN114183151A (en) | 2021-12-01 | 2021-12-01 | Device for compensating ground settlement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114183151A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6056481A (en) * | 1996-09-07 | 2000-05-02 | Dbt Automation Gmbh | Method and device for monitoring the load on hydraulic powered shield supports for underground mining |
| CN203889992U (en) * | 2014-05-26 | 2014-10-22 | 邹城市辰星煤机制修有限公司 | Hydraulic jack |
| JP2015001047A (en) * | 2013-06-13 | 2015-01-05 | 大成建設株式会社 | Unequal settlement countermeasure structure of construction |
| KR20150117373A (en) * | 2014-04-09 | 2015-10-20 | 주식회사 이제이텍 | Measurement apparatus for measuring an underground water level and ground subsidence in soft ground |
| CN205330699U (en) * | 2016-01-29 | 2016-06-22 | 中铁十一局集团城市轨道工程有限公司 | Under constructing, subway shield wears building with preventing subsiding strutting arrangement |
| CN206801564U (en) * | 2017-05-26 | 2017-12-26 | 中铁四局集团第三建设有限公司 | The hydraulic pressure support structure at existing station is worn under a kind of large span running tunnel super close distance |
-
2021
- 2021-12-01 CN CN202111451604.4A patent/CN114183151A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6056481A (en) * | 1996-09-07 | 2000-05-02 | Dbt Automation Gmbh | Method and device for monitoring the load on hydraulic powered shield supports for underground mining |
| JP2015001047A (en) * | 2013-06-13 | 2015-01-05 | 大成建設株式会社 | Unequal settlement countermeasure structure of construction |
| KR20150117373A (en) * | 2014-04-09 | 2015-10-20 | 주식회사 이제이텍 | Measurement apparatus for measuring an underground water level and ground subsidence in soft ground |
| CN203889992U (en) * | 2014-05-26 | 2014-10-22 | 邹城市辰星煤机制修有限公司 | Hydraulic jack |
| CN205330699U (en) * | 2016-01-29 | 2016-06-22 | 中铁十一局集团城市轨道工程有限公司 | Under constructing, subway shield wears building with preventing subsiding strutting arrangement |
| CN206801564U (en) * | 2017-05-26 | 2017-12-26 | 中铁四局集团第三建设有限公司 | The hydraulic pressure support structure at existing station is worn under a kind of large span running tunnel super close distance |
Non-Patent Citations (1)
| Title |
|---|
| 张昭;: "盾构施工时地表沉降的控制措施", 建材与装饰, no. 32, pages 296 * |
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