CN213478336U - Stiff cement soil construction system applied to tunnel tunneling construction - Google Patents
Stiff cement soil construction system applied to tunnel tunneling construction Download PDFInfo
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- CN213478336U CN213478336U CN202022667590.7U CN202022667590U CN213478336U CN 213478336 U CN213478336 U CN 213478336U CN 202022667590 U CN202022667590 U CN 202022667590U CN 213478336 U CN213478336 U CN 213478336U
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Abstract
The utility model relates to an underground construction technical field, especially indicate a strength nature soil cement construction system who is applied to tunnel excavation construction, including soil cement primary support structure, construction equipment, well and receiving well of starting, wherein well and receiving well are the well body that the excavation was seted up from ground down, and well and receiving well interval set up in order to reserve the construction space of starting; the construction equipment is arranged at an originating well, a plurality of cement soil primary support structures are arranged and adjacently connected and are arranged at a construction space below the ground, and each cement soil primary support structure consists of I-shaped steel, corrugated steel plates, a sleeve and an in-situ cement soil body; the cement soil primary support structure of the utility model uses the slag soil and the cement paste which are stirred and cut in situ, a large amount of steel is not needed to be consumed in the construction, the construction process is simple and quick, the construction period can be shortened, and the construction cost can be reduced; and the waterproof and water-stopping effects are greatly improved, and the in-situ stirring structure greatly reduces the disturbance to the stratum in the construction process, and is superior to the construction of a steel pipe curtain.
Description
Technical Field
The utility model relates to an underground construction technical field indicates a strength nature cement soil construction system who is applied to tunnel excavation construction especially.
Background
Along with the progress of urbanization, the utilization rate of underground space is continuously improved, more and more underground engineering excavation processes are accelerated, but because of the limitation on the development speed and long-term planning of cities, the construction of underground engineering always encounters various difficulties in the past, and the difficulties are particularly shown in the following steps: 1. when underground engineering excavation is carried out, cables, important buildings and the like above an excavation surface need to be protected; 2. and (4) paying attention to waterproof and anti-seepage measures at any moment in the underground engineering excavation process.
At present, the construction difficulty is generally solved by adopting a pipe curtain method, and the pipe curtain method comprises the following steps: jacking a steel pipe to a soil body between an originating well and a receiving well through pipe jacking equipment, connecting the single pipes on the side surface of the steel pipe by virtue of locking openings to form a pipe row, injecting a water stopping agent into a gap of the locking openings to meet the water stopping requirement to form an advanced support, and then constructing an underground box culvert structure under the protection of a pipe curtain; however, the construction method still has more defects which are difficult to overcome at present: (1) the steel pipe jacked into the soil body can not be recycled generally, so that the resource waste is caused, the project investment is large, and the construction cost is high; (2) a large amount of dregs and slurry need to be discharged when the steel pipe is jacked into the steel pipe, so that the environment is polluted; (3) a back soil effect is generated when the shallow soil-covered stratum is jacked into the jacking pipe; (4) the water tightness of the pipe curtain is poor, and the waterproof and water-stop effects are common; (5) the steel pipe is jacked into the ground, so that the ground is disturbed, and uneven settlement and deformation of the ground can be caused.
Disclosure of Invention
In order to solve the above problems, the utility model aims at disclosing an underground construction technical field, indicate especially a be applied to tunnel excavation construction's strength nature cement soil construction system, provide interim support and stagnant water effect for the underground construction through strength nature cement soil continuous wall to improve the construction efficiency fast.
In order to achieve the above object, the utility model adopts the following technical scheme: a stiff cement soil construction system applied to tunnel tunneling construction is characterized by mainly comprising a cement soil primary support structure, construction equipment, a starting well and a receiving well, wherein the starting well and the receiving well are well bodies dug and chiseled from the ground, and the starting well and the receiving well are arranged at intervals to reserve a construction space; the construction equipment is arranged at the originating well and comprises a pipe jacking machine and a stirring and crushing device, wherein the pipe jacking machine and the stirring and crushing device are arranged adjacently and are pushed inwards from the originating well for construction; the cement soil primary support structure is provided with a plurality of cement soil primary support structures which are adjacently connected and arranged in a construction space below the ground.
Preferably, each cement soil primary support structure is composed of I-shaped steel, corrugated steel plates, a sleeve and an in-situ cement soil body, and is integrally assembled to form a pile body structure.
Preferably, the casing of the cement soil primary support structure is a circular short-pipe-shaped structure, the I-shaped steel is formed into an I-shaped steel plate structure and is arranged in the casing, the corrugated steel plates are arranged in pairs, the pair of corrugated steel plates are arranged on the upper surface and the lower surface of the I-shaped steel, two opposite edges of each corrugated steel plate are tightly propped against the side wall of the casing, and the in-situ cement soil body is a block structure which is filled in the casing and surrounds the I-shaped steel and the corrugated steel plates.
Preferably, each adjacent primary support structure is overlapped and connected, and forms an integral frame-type mounting structure around the connection.
Preferably, the stirring and crushing device is provided with a spiral stirring head, and the spiral stirring head is used for spirally stirring and propelling the soil body.
The beneficial effects of the utility model are embodied in: when the cement soil primary support structure is constructed, the in-situ stirring and cutting slag soil and cement paste are used, so that a large amount of slag soil does not need to be discharged, the pollution is reduced compared with the traditional pipe jacking curtain, and the development of green environmental protection is met; in addition, the utility model has the advantages of no need of consuming a large amount of steel in the construction process, simple and quick construction process, shortened construction period and reduced construction cost; adopt simultaneously the utility model discloses a cement soil just props up structure and construction method after, its waterproof stagnant water effect is superior to the effect of steel pipe curtain greatly, and the cement soil just props up the structure of normal position stirring and also alleviates the stratum disturbance by a wide margin in the construction, is superior to steel pipe curtain construction.
Firstly, the utility model discloses a construction equipment of cement soil primary support structure realizes that traditional pipe jacking equipment has the function of advancing, guiding, dumping on the basis, still has functions such as cutting, stirring, transport cement paste to with broken, cut, collect, transport function integration in construction equipment's advancing power device department, combine advance thick liquid and mixing system, realize the formation of cement soil primary support structure; secondly, the utility model is applied to the primary cement soil supporting structure of underground excavation in tunnel excavation, plays the roles of water stopping, water prevention and temporary support of optimization and improvement, and protects the primary cement soil supporting structure through a construction method; and secondly, because the utility model discloses an important effect of cement soil primary support structure is waterproof stagnant water, consequently to the part that the intersection of cement soil primary support structure, pile body horizontal centre-to-centre spacing in the strict control cement soil primary support structure in the construction method to lapped continuity and waterproof performance between control stake and the stake.
Drawings
FIG. 1 is a schematic diagram of the construction of the primary support structure of cement soil.
Fig. 2 is a horizontal cross-sectional view of the pile body of the primary supporting structure of cement soil of the utility model.
Fig. 3 is a horizontal cross-sectional view of the pile body of the primary supporting structure of cement soil of the present invention.
Fig. 4 is a schematic plan view of the whole installation of the primary cemented soil support structure of the present invention.
Fig. 5 is a construction process diagram of the primary cemented soil supporting structure of the present invention.
Reference is made to the accompanying drawings in which: the method comprises the following steps of 1-cement soil primary support structure, 2-construction equipment, 3-starting well, 4-receiving well, 5-underground excavation construction area, 11-I-shaped steel, 12-corrugated steel plate, 13-casing pipe, 14-in-situ cement soil body, 21-pipe jacking machine and 22-stirring crushing device.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:
a stiff cement soil construction system applied to tunnel excavation construction mainly comprises a cement soil primary support structure 1, construction equipment 2, a starting well 3 and a receiving well 4, wherein the starting well 3 and the receiving well 4 are well bodies excavated from the ground, and the starting well 3 and the receiving well 4 are arranged at intervals to reserve a construction space; the construction equipment 2 is arranged at the originating well 3, the construction equipment 2 mainly comprises a pipe jacking machine 21 and a stirring and crushing device 22, the pipe jacking machine 21 and the stirring and crushing device 22 are adjacently installed and are pushed inwards from the originating well for construction, and besides jacking, crushing and stirring power, the construction equipment also relates to a power device for guiding, dumping, cutting and drawing sectional materials, a level bar, a mechanical frame, a cutting drill bit with a grouting function and the like; the cement soil primary support structures 1 are provided with a plurality of adjacent connected cement soil primary support structures and are arranged in a construction space below the ground, each cement soil primary support structure 1 is respectively composed of an I-shaped steel 11, corrugated steel plates 12, a sleeve 13 and an in-situ cement soil body 14 and is integrally assembled to form a pile body structure, wherein the sleeve 13 is a round short pipe-shaped structure, the I-shaped steel 11 is formed into an I-shaped steel plate structure and is arranged in the sleeve 13, a pair of corrugated steel plates 12 are arranged on the upper surface and the lower surface of the I-shaped steel 11, two opposite edges of each corrugated steel plate 12 are tightly propped against the side wall of the sleeve 13, and the in-situ cement soil body 14 is a block structure which is filled in the sleeve 13 and surrounds; the adjacent primary cement soil supporting structures 1 are connected in an overlapping mode and form an integral frame type mounting structure in a surrounding mode, and the area inside the formed frame is an underground excavation construction area 5; the stirring and crushing device 22 is provided with a spiral stirring head, and the spiral stirring head is used for spirally stirring and propelling the soil body.
The construction method of the stiff cement soil construction system applied to tunnel driving construction mainly comprises the following steps:
s1, constructing an equipment working well of the cement soil primary support structure 1, wherein the equipment working well comprises an initial well 3 and a receiving well 4;
the step S1 further includes:
1) planning a construction area range to determine an installation area of the cement soil primary support structure 1;
2) the position of the equipment working well is defined outside the construction area;
3) and excavating the equipment working well to provide an operation space for the construction equipment 2.
S2, arranging a positioning auxiliary line of the cement soil primary support structure 1 on the equipment working well;
the step S2 further includes:
1) arranging a positioning auxiliary line on the equipment working well, and correcting the mechanical frame by adopting a horizontal ruler before drilling so as to determine the horizontal positioning of the cement soil primary support structure 1;
2) the construction precision of drilling is controlled, the horizontal center distance of the pile body of the cement-soil primary support structure 1 is controlled, and the center distance of the pile body of the cement-soil primary support structure 1 directly influences the continuity and the waterproof performance of lap joint between piles.
S3, preparing cement soil according to the mixture ratio of materials; the materials for preparing the cement soil comprise: cement paste: cutting a soil body: the other admixture has larger difference of cement-soil mechanical indexes of different cements, different soil qualities and different mixing ratios, so that the mixing amount of the cement and the admixture is subjected to field soil tests, injected cement slurry is reasonably mixed according to the condition of the engineering soil quality, and the mixing ratio of the materials is determined;
s4, regulating and controlling the guiding precision of the cutting bit during the construction of the cement soil primary support structure 1; after the guiding precision of the cutting drill bit during construction of the cement soil primary support structure 1 is regulated, the cutting drill bit is adopted to drill a standard hole firstly during construction, and then a deviation-correctable drill bit with a gyroscope is adopted to track the advancing direction of the cutting drill bit in real time so as to directly control the track of the drilling of the drill bit through a wedge-shaped plate at the front end of the drill bit;
s5, mixing, stirring and batching to form the in-situ cement soil body 14, and forming into an integral pile body structure; the method specifically comprises the following steps:
1) in the process of crushing and cutting soil bodies by a drill bit, continuously pulling a sleeve 13 and a prefabricated section, wherein the prefabricated section comprises I-shaped steel 11 and a corrugated steel plate 12;
2) mixing and stirring the crushed cut soil body and the cement paste in situ in the sleeve 13 to preliminarily form in-situ cement soil, wherein the formed cement soil has certain strength;
3) the in-situ cement soil and the prefabricated section are solidified to form a pile body structure of a cement soil primary support structure 1 with certain strength;
s6, regulating and controlling the center distance of each cement pile body structure and forming a connected frame type mounting structure; repeating the steps S4 and S5, and simultaneously regulating and controlling the center distance between the adjacent cement soil piles to complete the lapping work between the piles to form a frame type mounting structure of the waterproof, water-stopping and temporary-supporting cement soil primary support structure 1;
s7, carrying out recovery work after construction is finished; after the horizontal cement soil primary support structure 1 is formed, cleaning and recycling work is carried out, and construction equipment 2 such as a cutting grouting drill bit and a mechanical frame and a steel sleeve 13 are recycled.
The utility model discloses an innovation based on pipe curtain method technique, utilize and carry out abundant mixed stirring with the cement slurry according to the ratio with the earth that the tunnelling was cut off, and add corrugated steel and I-steel 11 and form strength nature cement soil primary structure 1, it is a construction method that can play waterproof stagnant water and temporary support effect for the undercut method, because its cement soil is through in situ mixing slag soil and cement slurry formation, it is extremely little to peripheral environment and stratum disturbance influence, adopt the power front end device that has cutting, breakage, stirring and pull the section bar simultaneously, realize in situ mixing cement soil in the hole, and through pulling the section bar that adds, the performance of cement soil has greatly improved, the intensity of cement soil primary structure 1 has been guaranteed, it is applicable to the below of existing subway and passes through, the excavation of station under the rich water geology condition, the preliminary support of tunnel in the weak broken stratum, etc., the underground excavation construction method solves the problems of water prevention and water stop in the underground excavation construction process, plays a role of temporary support, and is particularly suitable for the underground excavation construction of weak, water-rich, gravel soil strata and composite strata.
The utility model discloses a cutting drill bit with slip casting function cuts the soil body and mixes the stirring again with cement paste in sleeve pipe 13, forms continuous normal position cement soil whole just supporting structure, reaches to improve the problem that the stagnant water permeates water, plays temporary support's effect, is applicable to the comparatively complicated stratum structure of soil property, mainly includes weak stratum, is rich in water stratum, gravel soil stratum and soft or hard composite stratum etc.. Compared with the traditional steel pipe curtain construction method and the freezing method construction method, the method has the advantages that the cutting slag soil is recycled, the damage of slurry to the environment and the use amount of steel are reduced, and the national green and environment-friendly requirements are met; disturbance to the stratum is reduced in the construction process, the probability of occurrence of engineering accidents is reduced, and the traditional steel pipe curtain and freezing method construction can be replaced in the underground excavation construction process; in the utility model, the sleeve 13 can be a threaded steel sleeve 13, the steel sleeve 13 is pushed in one section by one section between two working wells, the length of the steel sleeve 13 is about 1.5m, the next section pushed in can be locked with the previous section of the steel sleeve 13 by the threaded connection of the steel sleeve 13, and the steel sleeve 13 is pulled out and recovered from the working wells after the primary support structure is completed; a cutter head of the construction equipment 2 destroys a soil body in the tunneling process, a connecting channel is arranged between the cutter head and a steel sleeve 13, the destroyed soil body is input into the steel sleeve 13 by the connecting channel, simultaneously cement slurry with reasonable proportion is added, the soil body after being cut and broken and the cement slurry with reasonable proportion are mixed and stirred in situ in the sleeve 13, and in situ cement soil with certain strength is preliminarily formed.
The above, it is only the preferred embodiment of the present invention, not right the technical scope of the present invention makes any restriction, the technical personnel of the industry, under this technical scheme's enlightenment, can do some deformation and modification, all the basis the utility model discloses a technical essence is to any modification, the equivalent change and the modification of the above embodiment do, all still belong to the technical scheme's scope of the present invention.
Claims (5)
1. A stiff cement soil construction system applied to tunnel tunneling construction is characterized by mainly comprising a cement soil primary support structure, construction equipment, a starting well and a receiving well, wherein the starting well and the receiving well are well bodies dug and chiseled from the ground, and the starting well and the receiving well are arranged at intervals to reserve a construction space; the construction equipment is arranged at the originating well and comprises a pipe jacking machine and a stirring and crushing device, wherein the pipe jacking machine and the stirring and crushing device are arranged adjacently and are pushed inwards from the originating well for construction; the cement soil primary support structure is provided with a plurality of cement soil primary support structures which are adjacently connected and arranged in a construction space below the ground.
2. A stiff cement soil construction system applied to tunnel driving construction according to claim 1, characterized in that each primary cement soil support structure is composed of I-steel, corrugated steel plate, sleeve and in-situ cement soil body, and is integrally assembled to form a pile body structure.
3. A stiff cement soil construction system applied to tunnel driving construction according to claim 2 is characterized in that the sleeve of the cement soil primary support structure is a round short tubular structure, the I-shaped steel is formed into an I-shaped steel plate structure and is installed in the sleeve, the corrugated steel plates are arranged in pairs, a pair of corrugated steel plates are installed on the upper and lower surfaces of the I-shaped steel, two opposite edges of each corrugated steel plate are tightly abutted to the side wall of the sleeve, and the in-situ cement soil body is a block structure filled in the sleeve and surrounding the I-shaped steel and the corrugated steel plates.
4. A stiff soil cement construction system for use in tunnel boring construction according to claim 2 wherein each adjacent primary soil cement support structure is overlapping connected and forms an integral frame like mounting structure therearound.
5. A stiff cement soil construction system applied to tunnel driving construction according to claim 1 is characterized in that the stirring crushing device is provided with a spiral stirring head, and the soil body is stirred and propelled spirally through the spiral stirring head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022667590.7U CN213478336U (en) | 2020-11-17 | 2020-11-17 | Stiff cement soil construction system applied to tunnel tunneling construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022667590.7U CN213478336U (en) | 2020-11-17 | 2020-11-17 | Stiff cement soil construction system applied to tunnel tunneling construction |
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| CN213478336U true CN213478336U (en) | 2021-06-18 |
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| CN202022667590.7U Active CN213478336U (en) | 2020-11-17 | 2020-11-17 | Stiff cement soil construction system applied to tunnel tunneling construction |
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