CN114215070A - Super-deep TRD (blast furnace direct reduction) wall forming construction method for gravel water-rich stratum based on assembled L-shaped guide wall - Google Patents
Super-deep TRD (blast furnace direct reduction) wall forming construction method for gravel water-rich stratum based on assembled L-shaped guide wall Download PDFInfo
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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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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Abstract
The invention discloses a method for constructing a super-deep TRD wall of a gravel water-rich stratum based on an assembled L-shaped guide wall, which comprises the following steps: 1) excavating a sample trench; 2) assembling assembled L-shaped guide wall modules at the inner side wall and the outer side wall of the sample trench respectively to form an inner assembled L-shaped guide wall and an outer assembled L-shaped guide wall, wherein a gap exists between the inner assembled L-shaped guide wall and the outer assembled L-shaped guide wall, and soil is back filled in the gap between the inner assembled L-shaped guide wall and the outer assembled L-shaped guide wall; 3) the number and the positions of the digging holes are designed between the inner and outer assembled L-shaped guide walls, the holes are led in a jumping and beating mode, large stones in soil are removed, and soil generated by the holes is used for backfilling the holes; 4) and cutting the soil body by adopting TRD equipment, injecting curing liquid, inserting I-steel into the curing liquid, and suspending the I-steel between an inner and an outer assembled L-shaped guide walls through steel pipes to form the TRD wall body. The invention can ensure that the I-steel is accurately positioned without deviation, and the TRD wall body has higher quality.
Description
Technical Field
The invention relates to the technical field of diaphragm wall construction, in particular to an ultra-deep TRD wall forming construction method for a gravel water-rich stratum based on an assembled L-shaped guide wall.
Background
With the continuous development of foundation pit engineering towards the fields of super large and super deep, the safety of foundation pit support becomes more and more important, and the selection of a reasonable enclosure structure is more and more important. When the foundation pit enclosure construction is carried out in the ultra-deep water-rich stratum, the foundation pit enclosure construction can meet a round gravel stratum which is an underground water occurrence area and has confined water, and the confined water is likely to turn over and swell in the earth excavation construction process, so that the round gravel stratum is required to be pretreated.
The current method for pretreating the round gravel layer is as follows: and (4) using a rotary drilling machine to guide holes in advance, and then constructing the enclosure structure. However, the water-rich round gravel stratum is used as a bad geological condition and has strong water permeability, when a soil body is excavated, the soil body is loose, weak in cohesive force, severe in collapse and difficult to uniformly layer, so that when the round gravel water-rich stratum is constructed, the disturbance generated on the stratum is obviously higher than that of a soft soil stratum, the deformation of the stratum needs to be strictly controlled in the construction process, and the stability of the enclosure structure and the safety of a foundation pit are ensured; the presence of confined water can also cause the enclosure to tilt, resulting in poor enclosure uniformity.
Disclosure of Invention
The invention aims to provide a wall forming construction method of a round gravel water-rich stratum based on an assembled L-shaped guide wall for ultra-deep TRD (blast furnace top gas recovery device), and solves the problem that the disturbance to the surrounding environment is large when TRD construction in ultra-deep foundation pit engineering passes through the round gravel water-rich stratum.
In order to realize the technical purpose, the invention adopts the following technical scheme:
the invention relates to a method for constructing a super-deep TRD wall of a gravel water-rich stratum based on an assembled L-shaped guide wall, which comprises the following steps:
1) sample trench excavation: leveling a field, paving a road substrate on the surface of the field, and excavating a sample trench along the parallel direction of the central coordinate line of the designed TRD wall;
2) and (3) construction of an assembled L-shaped guide wall: assembling assembled L-shaped guide wall modules at the inner side wall and the outer side wall of the sample trench respectively to form an inner assembled L-shaped guide wall and an outer assembled L-shaped guide wall, wherein a gap exists between the inner assembled L-shaped guide wall and the outer assembled L-shaped guide wall, and soil is back filled in the gap between the inner assembled L-shaped guide wall and the outer assembled L-shaped guide wall;
3) hole guiding and backfilling: the number and the positions of the digging holes are designed between the inner and outer assembled L-shaped guide walls, the holes are led in a jumping and beating mode, large stones in soil are removed, and soil generated by the holes is used for backfilling the holes;
4) TRD wall construction: and cutting the soil body by adopting TRD equipment, injecting curing liquid, inserting I-steel into the curing liquid, and suspending the I-steel between an inner and an outer assembled L-shaped guide walls through steel pipes to form the TRD wall body.
Preferably, chamfers are arranged on the upper edges of the opposite sides of the inner and outer assembled L-shaped guide walls formed in the step 2), two ends of the steel pipe in the step 4) are respectively erected at the chamfers of the inner and outer assembled L-shaped guide walls, and the top end of the I-shaped steel is hung on the steel pipe through a plurality of hooks.
Preferably, when the assembled L-shaped guide wall in the step 2) is constructed, the adjacent assembled L-shaped guide wall modules are connected with each other in a mortise and tenon manner.
Preferably, a waterproof rubber strip is arranged at the splicing position between the adjacent assembly type L-shaped guide wall modules in the step 2).
Preferably, after the construction of the inner and outer assembled L-shaped guide walls in step 2) is completed, the inner and outer assembled L-shaped guide walls are temporarily supported by wood braces, and the wood braces are removed when soil is back-filled into the gap between the inner and outer assembled L-shaped guide walls.
Preferably, the backfill depth of the soil body backfilled to the gap between the inner and outer assembled L-shaped guide walls in the step 2) is 0.5m, the wood supports for temporarily supporting the inner and outer assembled L-shaped guide walls are arranged in a group every 2-3 m, each group of wood supports comprises two wood supports which are respectively supported at the upper and lower positions of the inner and outer assembled L-shaped guide walls.
Preferably, the hole diameter of the hole leading in the jumping mode in the step 3) is 800-1000 mm, and one hole is led at every interval of 1-2 hole positions.
Preferably, the soil used for backfilling the pilot hole in the step 3) is: bentonite or yellow mud mixed soil is added into the soil which is generated by the lead holes and is used for removing the massive stones.
Preferably, the step 4) is performed by cutting the soil body with a cutting box of the TRD device in three times, the cutting fluid is sprayed out when the soil body is cut in the first two times, and the curing fluid is sprayed out while the cutting fluid is sprayed out when the soil body is cut in the third time.
Preferably, the cutting fluid is expansive soil slurry; the solidifying liquid is mixed slurry of cement slurry, cellulose, white sugar and soda ash, and the mass ratio of the cement slurry, the cellulose, the white sugar, the soda ash and the expansive soil slurry is as follows: 2000: 0.67: 0.7: 2: 460.
the technical scheme of the invention has the following characteristics and beneficial effects:
1. the invention relates to a construction method for ultra-deep TRD (blast furnace direct-fired) wall forming of a gravel water-rich stratum based on an assembled L-shaped guide wall, which comprises the steps of firstly excavating a sample trench on the site, constructing the assembled L-shaped guide wall at the sample trench, erecting I-steel in a TRD wall between an inner assembled L-shaped guide wall and an outer assembled L-shaped guide wall through a steel pipe in the construction process of the TRD wall, ensuring the positioning precision of the I-steel, preventing the I-steel from displacing, ensuring the perpendicularity of the I-steel, simultaneously ensuring the flatness of the operation surface of TRD equipment by arranging an operation platform of the TRD equipment at the top plate of the assembled L-shaped guide wall, ensuring the wall forming perpendicularity precision of a later-stage grooving and an enclosure structure, further ensuring the lateral force resistance strength of the TRD wall, and improving the uniformity of the TRD wall.
2. The assembled L-shaped guide wall module in the ultra-deep TRD wall-forming construction method for the gravel water-rich stratum based on the assembled L-shaped guide wall adopts a mortise and tenon structure, is easy to assemble, and can realize the compactness of splicing.
3. According to the ultra-deep TRD wall-forming construction method for the round gravel water-rich stratum based on the assembled L-shaped guide wall, before the construction of a TRD wall body, partial soil body is replaced by leading holes, so that large blocks of stones in the soil body are reduced, and the abrasion of a TRD cutter can be reduced; and the hole guiding is carried out in a jumping mode, so that the deformation of the surrounding soil body can be effectively reduced.
Drawings
FIG. 1 is a flow chart of a construction method of ultra-deep TRD wall formation of a gravel water-rich stratum based on an assembled L-shaped guide wall;
FIG. 2 is a schematic view of an assembled "L" shaped guide wall;
FIG. 3 is a schematic view of a connection structure of adjacent assembled L-shaped guide wall modules;
FIG. 4 is a schematic diagram of a travel route of a rotary excavating machine for hole guiding backfilling and a TRD device for cutting a soil body;
FIG. 5 is a schematic illustration of the resulting pebble-rich ultra-deep TRD wall formation;
FIG. 6 is a top view of the resulting pebble-rich water ultra-deep TRD wall;
description of reference numerals: 1-assembled L-shaped guide wall, 11-assembled L-shaped guide wall module, 2-wood support, 3-waterproof adhesive tape, 5-TRD wall, 6-I-steel, 7-bolt, 8-steel pipe and 9-hook.
Detailed Description
The present invention is described in detail below, and technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached figure 1, the invention relates to a method for constructing ultra-deep TRD (blast furnace direct-fired) wall forming of a gravel water-rich stratum based on an assembled L-shaped guide wall, which comprises the following steps:
1) sample trench excavation: carry out the place and level and lay the road base board at the place ground surface, along the parallel direction excavation appearance ditch of the center coordinate line of the TRD wall body of design, it specifically includes:
1.1) preparation of construction
According to the geological survey data and the geological condition report, the unfavorable geological condition of the site is surveyed, a reasonable emergency scheme is formulated, a construction organization design scheme is compiled according to construction requirements, equipment and materials required by construction are prepared, the hydropower and the drain pipe of the construction site are connected, and the normal operation and the safety of the construction site are ensured;
1.2) measuring the pay-off
Determining a central coordinate point of the TRD wall according to the construction design drawing, lofting by using a total station, marking the position of a central line by using white lime, arranging workers for checking, confirming the position of the central coordinate point again, and completing the checking procedure of measurement data in time;
1.3) sample trench excavation
After the measurement lofting is finished, leveling the field and paving a road substrate, and excavating a groove by an excavator according to the parallel direction of the central coordinate line of the TRD wall until the excavation work is finished;
the excavation depth of the groove is 1.5m, and the width is 900 mm.
2) Construction of an assembled L-shaped guide wall 1: assembling assembled L-shaped guide wall modules 11 at the inner side wall and the outer side wall of the sample groove respectively to form an inner assembled L-shaped guide wall and an outer assembled L-shaped guide wall, wherein the width of each assembled L-shaped guide wall module 11 is 1m, the depth of each assembled L-shaped guide wall module is 1.55m, the thickness of each assembled L-shaped guide wall module is 300mm, and chamfers are arranged on the upper edges of the assembled L-shaped guide wall modules 11; during assembly, adjacent assembly type L-shaped guide wall modules 11 are connected with each other in a mortise-tenon mode, a waterproof adhesive tape 3 is arranged at a splicing position between the adjacent assembly type L-shaped guide wall modules, a gap exists between an inner assembly type L-shaped guide wall and an outer assembly type L-shaped guide wall, after the construction of the inner assembly type L-shaped guide wall and the outer assembly type L-shaped guide wall is completed, the inner assembly type L-shaped guide wall and the outer assembly type L-shaped guide wall are temporarily supported by wood supports 2, the wood supports 2 are arranged in groups at intervals of 2-3 m, each group of wood supports comprises two wood supports, and the two wood supports are respectively supported at the upper position and the lower position of the inner assembly type L-shaped guide wall and the upper position and the lower position of the outer assembly type L-shaped guide wall, as shown in attached figures 2 and 3; after all the inner and outer assembled L-shaped guide walls are constructed, the wood supports 2 are dismantled and soil is filled back into the gaps between the inner and outer assembled L-shaped guide walls, and the backfilling depth is 0.5 m.
3) Hole guiding and backfilling: the method comprises the following steps of designing the number and the positions of dug holes between an inner L-shaped guide wall and an outer L-shaped guide wall, guiding the holes in a jumping and beating mode, wherein the hole diameter of each guiding hole is 800-1000 mm, one hole is guided at every interval of 1-2 hole positions, after the holes are guided, large blocks of stones need to be removed from soil generated by the guiding holes, then bentonite or yellow mud is added to form mixed soil, and the mixed soil is adopted to backfill the guiding holes, wherein the method comprises the following specific steps:
3.1) lead hole of rotary drilling machine
Before leading the hole, corresponding precipitation, seepage prevention and leakage prevention measures must be adopted; after the construction of the guide wall is completed, determining the number and the positions of the rotary excavating holes, numbering the rotary excavating holes in sequence, fixing the rotary excavating machines on hole positions to be excavated, driving the rotary excavating drilling machines into a soil body for drilling, setting the hole pitch of the rotary excavating machines to be 800-1000 mm, drilling by the rotary excavating machines in a 'jumping and beating' mode, drilling the 1 st hole by one rotary excavating machine, drilling the 3 rd hole by the second rotary excavating machine, and so on until the drilling is finished; for soil layers with poor geological conditions, the holes can be drilled at intervals of 2, when one rotary drilling machine drills the 1 st hole, the second rotary drilling machine drills the 4 th hole, and the like. And after the hole leading of the rotary excavating machine is finished, removing pebbles and other large stones with the particle size of more than 10cm from the excavated soil body.
3.1) excavator backfill
Backfilling with an excavator, backfilling the soil body excavated at the hole guiding stage, and adding bentonite or yellow mud and the replacement soil of the previous construction section.
4) TRD wall construction: adopt TRD equipment cutting soil body and pour into the solidification liquid into, the cutting case cutting soil body of TRD equipment is gone on in the cubic, spouts cutting fluid when the preceding twice cutting soil body, still spouts solidification liquid when spouting cutting fluid when the third time cutting soil body, cutting fluid be inflation soil thick liquid, solidification liquid be the mixed thick liquid of cement thick liquid, cellulose, white sugar and soda, the mass ratio of cement thick liquid, cellulose, white sugar, soda, inflation soil thick liquid is: 2000: 0.67: 0.7: 2: 460; then, inserting the I-steel 6 into the curing liquid, wherein the I-steel 6 is suspended between the inner and outer assembled L-shaped guide walls through the steel pipe 8, namely, two ends of the I-steel 6 are respectively fixed at the chamfers of the inner and outer assembled L-shaped guide walls 1 through bolts 7, the top end of the steel pipe 8 is hung on the steel pipe 8 through a hook 9, and after the curing liquid is completely hardened, the TRD wall 5 with the I-steel 6 arranged inside can be formed as shown in figures 5 and 6, wherein the specific construction method of the step is as follows:
4.1) pile driver taking place and installing cutting box
Digging a cuboid groove along the central line of the TRD wall body by using an excavator, wherein the depth of the groove is 3-5 m, the width of the groove is 1m, placing a cutting box into the groove by using a crawler crane, and tightening the cutting box and a chain connecting bolt 7. The TRD device 11 moves to drill down the depth of a section of cutting box, then the connected cutting box is disassembled, the crawler crane places a section of cutting box in the original cuboid groove, the host machine is connected with the cutting box in the cuboid groove, the host machine moves to the position of the drilled-down cutting box to connect a second section of cutting box and drill down to the depth of the second section of cutting box, and the steps are repeated until the designed depth is reached;
4.2) installation of inclinometer
The cutting box is installed and is placed to the designed depth, then an inclinometer is installed, the inclinometer is a main means for controlling the perpendicularity of a wall body in the whole TRD construction process, the inclinometer is installed inside the cutting box, an upper pipe bottom cover is installed on an inclinometer pipe, the inclinometer pipe is fixed through screws or glue, the inclinometer pipe is connected with the inclinometer pipe through a connecting pipe and is communicated with an electronic display instrument in a cab through screw fixation, real-time observation and real-time correction can be realized during construction, and the perpendicularity required by general design is controlled within 1/300;
4.3) TRD wall construction
After the TRD equipment cutting box is installed, excavating fluid (expansive soil slurry with the addition of 4808kg of expansive soil) is injected through a pressure slurry pump, the cutting box is pushed forward to excavate a loose original soil layer and cut into a groove for a section of travel, in order to ensure the TRD wall forming quality, the cutting box is retracted to the initial point, slurry is replaced, curing fluid (cement slurry with the addition of 21.64 tons of cement, 14.5kg of cellulose, 15kg of white sugar and 43.3kg of soda) is injected through the pressure slurry pump, the cutting box is pushed forward and mixed with the slurry of the excavating fluid to form the equal-thickness cement-soil mixing wall. And repeating the steps until the cement-soil wall with the same thickness in the same direction is completely finished.
During construction, firstly welding the hook 9 on the I-shaped steel 6, inserting the I-shaped steel 6 according to the design strength of the TRD wall body, wherein the insertion depth is the support depth, hanging the hook 9 of the I-shaped steel 6 on a steel pipe 8 crossing the inner and outer guide wall chamfers after reaching the support depth, and screwing the bolt 7 into a reserved bolt hole of the steel pipe 8;
the TRD wall forming construction adopts a three-step cutting wall forming method, namely after the TRD equipment is cut to the depth of the waterproof curtain, only cutting liquid is sprayed out in the first two steps, curing liquid is sprayed out in the third cutting step, and the three steps are stirred to form a wall. The equal-thickness cement-soil mixing wall should be constructed continuously, and the step distance is not larger than 50 mm.
The corner position of the TRD wall body is required to be made into a cross-shaped lap joint form, two sides of the TRD wall body extend for 2m to carry out lap joint construction, the guniting pressure and the stirring speed at the corner are required to be uniform at a low speed, the lap joint length is ensured, and cold seams or local weak points are prevented from being generated. The formed wall should overlap on the same day, the formed wall should not be smaller than 500mm, the digging speed should be strictly controlled in the overlapping area, so that the curing liquid and the mixed slurry are fully mixed and stirred, the stirring speed needs to be slowed down in the overlapping construction to ensure the overlapping quality, and the flow of the grouting pump should be adjusted according to the change of the actual digging speed.
4.4) pulling and cutting box
And after the spraying and wall forming are finished, injecting the curing liquid with the same proportion into the pulling area of the planned cutting box, and pulling and grouting simultaneously. And (3) lifting the cutting box by using a 2000t crawler crane, wherein the lifting length is 3-4 sections of the cutting box, synchronously grouting, keeping the liquid level balance, and lifting the decomposed cutting box to an appointed position. And repeating the steps until the cutting box is completely pulled out.
Referring to the attached drawings 5 and 6, the super-deep TRD wall forming construction method for the round gravel water-rich stratum based on the assembled L-shaped guide wall comprises an inner assembled L-shaped guide wall 1, an outer assembled L-shaped guide wall 1, I-shaped steel 6 and a TRD wall body 5. Assembled "L" type lead wall 1 lead by a plurality of assembled "L" type lead wall module 11 concatenation and form, adjacent assembled "L" type lead between the wall module 11 through the mode of tenon fourth of the twelve earthly branches connect, and adjacent assembled "L" type lead to be equipped with waterproof stripe 3 between the wall module 11, inside and outside two sets of assembled "L" type lead and erect steel pipe 8 between the wall 1, I-steel 6 set up in TRD wall body 5, and the top of I-steel is connected with steel pipe 8 through couple 9.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. A wall forming construction method of a super deep TRD (blast furnace direct-fired) in a gravel water-rich stratum based on an assembled L-shaped guide wall is characterized by comprising the following steps:
1) sample trench excavation: leveling a field, paving a road substrate on the surface of the field, and excavating a sample trench along the parallel direction of the central coordinate line of the designed TRD wall;
2) and (3) construction of an assembled L-shaped guide wall: assembling assembled L-shaped guide wall modules at the inner side wall and the outer side wall of the sample trench respectively to form an inner assembled L-shaped guide wall and an outer assembled L-shaped guide wall, wherein a gap exists between the inner assembled L-shaped guide wall and the outer assembled L-shaped guide wall, and soil is back filled in the gap between the inner assembled L-shaped guide wall and the outer assembled L-shaped guide wall;
3) hole guiding and backfilling: the number and the positions of the digging holes are designed between the inner and outer assembled L-shaped guide walls, the holes are led in a jumping and beating mode, large stones in soil are removed, and soil generated by the holes is used for backfilling the holes;
4) TRD wall construction: and cutting the soil body by adopting TRD equipment, injecting curing liquid, inserting I-steel into the curing liquid, and suspending the I-steel between an inner and an outer assembled L-shaped guide walls through steel pipes to form the TRD wall body.
2. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall according to claim 1, wherein the method comprises the following steps: the upper edges of the opposite sides of the inner and outer assembled L-shaped guide walls formed in the step 2) are provided with chamfers, two ends of the steel pipe in the step 4) are respectively erected at the chamfers of the inner and outer assembled L-shaped guide walls, and the top end of the I-shaped steel is hung on the steel pipe through a plurality of hooks.
3. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall according to claim 1, wherein the method comprises the following steps: when the assembled L-shaped guide wall in the step 2) is constructed, the adjacent assembled L-shaped guide wall modules are connected with each other in a mortise and tenon mode.
4. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall as claimed in claim 3, wherein the method comprises the following steps: and a waterproof adhesive tape is arranged at the splicing position between the adjacent assembly type L-shaped guide wall modules in the step 2).
5. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall according to claim 1, wherein the method comprises the following steps: and 2) after the construction of the inner and outer assembled L-shaped guide walls is finished, temporarily supporting the inner and outer assembled L-shaped guide walls by using wood supports, and removing the wood supports when soil is filled back into the gap between the inner and outer assembled L-shaped guide walls.
6. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall as claimed in claim 5, wherein the method comprises the following steps: in the step 2), the backfill depth of the soil body backfilled in the gap between the inner and outer assembled L-shaped guide walls is 0.5m, the wood supports for temporarily supporting the inner and outer assembled L-shaped guide walls are arranged in a group every 2-3 m, and each group of wood supports comprises two wood supports which are respectively supported at the upper and lower positions of the inner and outer assembled L-shaped guide walls.
7. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall according to claim 1, wherein the method comprises the following steps: in the step 3), the hole diameter of the hole is 800-1000 mm by adopting a jumping and hitting mode, and one hole is led at every 1-2 hole positions.
8. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall according to claim 1, wherein the method comprises the following steps: the soil used for backfilling the guide holes in the step 3) is as follows: bentonite or yellow mud mixed soil is added into the soil which is generated by the lead holes and is used for removing the massive stones.
9. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall according to claim 1, wherein the method comprises the following steps: and 4) cutting the soil body by adopting a cutting box of the TRD equipment for three times, wherein the cutting liquid is sprayed out when the soil body is cut for the first two times, and the curing liquid is sprayed out while the cutting liquid is sprayed out when the soil body is cut for the third time.
10. The method for constructing the ultra-deep TRD wall of the round gravel water-rich stratum based on the assembled L-shaped guide wall as claimed in claim 9, wherein the method comprises the following steps: the cutting fluid is expansive soil slurry; the solidifying liquid is mixed slurry of cement slurry, cellulose, white sugar and soda ash, and the mass ratio of the cement slurry, the cellulose, the white sugar, the soda ash and the expansive soil slurry is as follows: 2000: 0.67: 0.7: 2: 460.
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