CN115977066A - Construction method of TRD cement mixing wall in limited space - Google Patents
Construction method of TRD cement mixing wall in limited space Download PDFInfo
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- CN115977066A CN115977066A CN202211426625.5A CN202211426625A CN115977066A CN 115977066 A CN115977066 A CN 115977066A CN 202211426625 A CN202211426625 A CN 202211426625A CN 115977066 A CN115977066 A CN 115977066A
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Abstract
The invention discloses a construction method of a TRD cement mixing wall in a limited space, which comprises the following steps: s1: preparation before construction: designing a construction scheme, leveling a field, and positioning a measuring defense line; s2: digging a groove, hoisting the embedded box and lowering the cutting box: selecting a processing method according to the transverse speed of the cutting box; s3: the pile driver is in place; s4: the cutting box is connected with the host; s5: installing an inclinometer; s6: forming a wall by a TRD construction method: injecting excavating liquid or curing liquid into the bottom of the cutting box, and forcibly mixing and stirring the excavating liquid or the curing liquid with the in-situ soil body to form the equal-thickness cement soil underground continuous wall; inserting H-shaped steel, wherein the H-shaped steel is inserted within 30min after the construction of the underground continuous wall is finished, and the H-shaped steel is inserted by adopting a firm positioning clamp; s7: and pulling out the cutting box. According to the invention, a proper method can be selected according to specific conditions, so that the construction efficiency can be improved, and the quality of a finished product is not influenced.
Description
Technical Field
The invention relates to the technical field of TRD cement mixing wall construction, in particular to a construction method of a TRD cement mixing wall in a limited space.
Background
With the acceleration of the urbanization construction process in China, the density of buildings is increased, deep foundation pit projects are increased day by day, the requirement of a high water level area on a foundation pit supporting project is increased, the traditional process adopts forms of a slope protection pile, a three-shaft stirring pile, an interlocking pile and the like, the water stop effect, the verticality and the wall forming quality are difficult to control, and the defect of low construction efficiency exists particularly in hard and complex geology.
The existing floating stone bottom layer continuous wall construction process can refer to Chinese patent application document with application publication number CN108951609A, and discloses an underground continuous wall construction method suitable for a soft and hard uneven pebble and boulder stratum.
The existing underground diaphragm wall construction process is mainly directed at a common stratum structure, and when a subway is built in a coastal city, most of coastal stratums are high-water-level boulder stratum structures. At present, a single-shaft or multi-shaft spiral drilling machine is mostly adopted in the traditional underground continuous wall construction, and a column type cement-soil mixing continuous wall is formed through construction.
Disclosure of Invention
The invention aims to provide a construction method of a TRD cement mixing wall in a limited space, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method of a TRD cement mixing wall in a limited space comprises the following steps:
s1: preparation before construction: designing a construction scheme, leveling a site, and positioning a measuring defense line;
s2: digging a groove, hoisting the embedded box and lowering the cutting box: selecting a processing method according to the transverse speed of the cutting box;
s3: the pile driver is in place;
s4: the cutting box is connected with the host computer: hanging the cutting boxes section by section into the pre-buried holes, and fixing by using a support table; the TRD host moves to the pre-buried point position to be connected with the cutting box, and the TRD host returns to the preset construction position to carry out self-driving of the cutting box into the excavation process;
s5: installing an inclinometer: after the cutting box is driven to the designed depth, an inclinometer is installed; managing the vertical precision of the wall body by an inclinometer, wherein the precision of 1/250 needs to be realized;
s6: the TRD construction method comprises the following steps: injecting digging liquid or curing liquid into the bottom of the cutting box, and forcibly mixing and stirring the digging liquid or the curing liquid with the in-situ soil body to form the equal-thickness cement soil underground continuous wall; inserting H-shaped steel, wherein the H-shaped steel is inserted within 30min after the construction of the underground continuous wall is finished, and the H-shaped steel is inserted by adopting a firm positioning clamp;
s7: pulling out the cutting box: and after the construction of each working section of the trial wall and the cement-soil mixing wall is finished, the cutting boxes are pulled out in sections by using a crane, and the equipment is transferred to the next working surface for preparation of construction.
Preferably, the transverse speed of the cutting box in the S2 is not less than 1.7m/h, and then the cutting box is drilled to a preset depth, and then the curing liquid is injected to propel forwards, excavate and stir into a wall;
and S2, when the transverse speed of the cutting box is less than 1.7m/h, after the saw chain type cutting box drills to a preset depth, firstly, injecting excavating liquid to excavate for a certain distance, then, withdrawing and excavating to the original position, and then, injecting curing liquid to propel and stir forwards to form a wall.
Preferably, the formed wall is cut again and stirred at the joint when the formed wall is cold-seamed in the S6, so that the water stopping effect is ensured.
Preferably, the cement slurry in S6 should be prepared strictly according to a predetermined mixing ratio to prevent mortar segregation.
Preferably, S6 also includes H shaped steel recovery, and H shaped steel adopts hydraulic pressure pulling machine to pull out the recovery, and the space after H shaped steel is pulled out adopts fine sand and cement thick liquid in time to backfill.
Preferably, the slurry conveying pipeline in the grouting stage of S6 cannot be blocked, the slurry breaking phenomenon is not allowed to occur, the pile body needs to be grouted uniformly, and a soil slurry sandwich layer cannot occur. And (3) stopping the pump immediately when the pipeline is blocked, starting the stirring drilling tool immediately after the treatment is finished, stopping for about 1min, continuing grouting, and waiting for 40-60s to recover transverse stirring and cutting.
Preferably, in S7, the drawing speed must be controlled when the cutting box is drawn out, so as to prevent the liquid level of the trench slurry from being lowered due to an excessively high drawing speed and prevent the front end of the cutting box from being in a vacuum state.
Compared with the prior art, the invention has the beneficial effects that: digging a groove, hoisting the embedded box and lowering the cutting box: selecting a processing method according to the transverse speed of the cutting box; the transverse speed of the cutting box is not less than 1.7m/h, and then the cutting box is drilled to a preset depth and then solidification liquid is injected to advance, excavate and stir to form a wall; when the transverse speed of the cutting box is less than 1.7m/h, after the saw chain type cutting box drills to a preset depth, firstly, the cutting box is filled with excavating liquid to excavate for a certain distance, then, the cutting box is withdrawn and excavated to the original position, and then, curing liquid is filled in to be pushed forward and stirred to form a wall; an appropriate method can be selected according to specific conditions, so that the construction efficiency can be improved, and the quality of a finished product is not influenced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a method for constructing a TRD cement mixing wall in a confined space includes the following steps:
s1: preparation before construction: designing a construction scheme, leveling a site, and positioning a measuring defense line;
s2: digging a groove, hoisting the embedded box and lowering the cutting box: selecting a processing method according to the transverse speed of the cutting box;
s3: the pile driver is in place;
s4: the cutting box is connected with the host computer: hanging the cutting boxes section by section into the pre-buried holes, and fixing by using a support table; the TRD host moves to the pre-buried acupuncture point position to be connected with the cutting box, and the TRD host returns to the preset construction position to carry out self-driving of the cutting box into the excavation process;
s5: installing an inclinometer: after the cutting box is driven to the designed depth, an inclinometer is installed; managing the vertical precision of the wall body by an inclinometer, wherein the precision of 1/250 needs to be realized;
s6: forming a wall by a TRD construction method: injecting excavating liquid or curing liquid into the bottom of the cutting box, and forcibly mixing and stirring the excavating liquid or the curing liquid with the in-situ soil body to form the equal-thickness cement soil underground continuous wall; inserting H-shaped steel, wherein the H-shaped steel is inserted within 30min after the construction of the underground continuous wall is finished, and the H-shaped steel is inserted by adopting a firm positioning clamp;
s7: pulling out the cutting box: and after the construction of each working section of the trial wall and the cement-soil mixing wall is finished, the cutting boxes are pulled out in sections by using a crane, and the equipment is transferred to the next working surface for preparation of construction.
Preferably, the transverse speed of the cutting box in the S2 is not less than 1.7m/h, and then the cutting box is drilled to a preset depth, and then the curing liquid is injected to propel forwards, excavate and stir into a wall;
and (3) when the transverse speed of the cutting box in the S2 is less than 1.7m/h, after the saw chain type cutting box drills to a preset depth, firstly, the excavating liquid is injected to excavate for a certain distance, then, the cutting box is withdrawn and excavated to the original position, and then, the curing liquid is injected to propel and stir the cutting box forwards to form a wall.
Preferably, the formed wall is cut again and stirred at the joint when the formed wall is cold-seamed in the S6, so that the water stopping effect is ensured.
Preferably, the cement slurry in S6 is prepared according to a predetermined mixing proportion strictly, so that mortar segregation is prevented.
Preferably, S6 also includes H shaped steel recovery, and H shaped steel adopts hydraulic pressure pulling machine to pull out the recovery, and the space after H shaped steel is pulled out adopts fine sand and cement thick liquid in time to backfill.
Preferably, the slurry conveying pipeline in the grouting stage of S6 cannot be blocked, the slurry breaking phenomenon is not allowed to occur, the pile body needs to be grouted uniformly, and a soil slurry sandwich layer cannot occur. And (3) stopping the pump immediately when the pipeline is blocked, starting the stirring drilling tool immediately after the treatment is finished, stopping for about 1min, continuing grouting, and waiting for 40-60s to recover transverse stirring and cutting.
Preferably, in S7, the drawing speed must be controlled when the cutting box is drawn out, so as to prevent the liquid level of the trench slurry from being lowered due to an excessively high drawing speed and prevent the front end of the cutting box from being in a vacuum state.
The working principle of the invention is as follows: s1: preparation before construction: designing a construction scheme, leveling a site, and positioning a measuring defense line; s2: digging a groove, hoisting the pre-buried box and lowering the cutting box: selecting a processing method according to the transverse speed of the cutting box; s3: the pile driver is in place;
s4: the cutting box is connected with the host computer: hanging the cutting boxes section by section into the pre-buried holes, and fixing by using a support table; the TRD host moves to the pre-buried point position to be connected with the cutting box, and the TRD host returns to the preset construction position to carry out self-driving of the cutting box into the excavation process; s5: installing an inclinometer: after the cutting box is driven into the designed depth, an inclinometer is installed; managing the vertical precision of the wall body by an inclinometer, wherein the precision of 1/250 needs to be realized; s6: the TRD construction method comprises the following steps: injecting excavating liquid or curing liquid into the bottom of the cutting box, and forcibly mixing and stirring the excavating liquid or the curing liquid with the in-situ soil body to form the equal-thickness cement soil underground continuous wall; inserting H-shaped steel, wherein the H-shaped steel is inserted within 30min after the construction of the underground continuous wall is finished, and the H-shaped steel is inserted by adopting a firm positioning clamp; s7: pulling out the cutting box: and after the construction of each working section of the trial wall and the cement-soil mixing wall is finished, the cutting boxes are pulled out in sections by using a crane, and the equipment is transferred to the next working surface for preparation of construction.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A construction method of a TRD cement mixing wall in a limited space is characterized by comprising the following steps: the method comprises the following steps:
s1: preparation before construction: designing a construction scheme, leveling a site, and positioning a measuring defense line;
s2: digging a groove, hoisting the embedded box and lowering the cutting box: selecting a processing method according to the transverse speed of the cutting box;
s3: the pile driver is in place;
s4: the cutting box is connected with the host computer: hanging the cutting boxes section by section into the pre-buried holes, and fixing by using a support table; the TRD host moves to the pre-buried point position to be connected with the cutting box, and the TRD host returns to the preset construction position to carry out self-driving of the cutting box into the excavation process;
s5: installing an inclinometer: after the cutting box is driven to the designed depth, an inclinometer is installed; managing the vertical precision of the wall body by an inclinometer, wherein the precision of 1/250 needs to be realized;
s6: the TRD construction method comprises the following steps: injecting digging liquid or curing liquid into the bottom of the cutting box, and forcibly mixing and stirring the digging liquid or the curing liquid with the in-situ soil body to form the equal-thickness cement soil underground continuous wall; inserting H-shaped steel, wherein the H-shaped steel is inserted within 30min after the construction of the underground continuous wall is finished, and the H-shaped steel is inserted by adopting a firm positioning clamp;
s7: pulling out the cutting box: and after the construction of each working section of the trial wall and the cement-soil mixing wall is finished, the cutting boxes are pulled out in sections by using a crane, and the equipment is transferred to the next working surface for preparation of construction.
2. The construction method of the TRD cement mixing wall in the limited space as claimed in claim 1, wherein the construction method comprises the following steps: in the S2, the transverse speed of the cutting box is not less than 1.7m/h, and after the cutting box drills to a preset depth, the cutting box starts to inject the curing liquid to propel, dig and stir to form a wall;
and S2, when the transverse speed of the cutting box is less than 1.7m/h, after the saw chain type cutting box drills to a preset depth, firstly, injecting excavating liquid to excavate for a certain distance, then, withdrawing and excavating to the original position, and then, injecting curing liquid to propel and stir forwards to form a wall.
3. The construction method of the TRD cement mixing wall in the limited space as claimed in claim 1, wherein the construction method comprises the following steps: and if the formed wall appears cold seams in the S6, the formed wall is cut and stirred again at the joints, so that the water stopping effect is ensured.
4. The construction method of the TRD cement mixing wall in the limited space as claimed in claim 1, wherein the construction method comprises the following steps: the cement slurry in the S6 is strictly prepared according to the preset mixing proportion, so that the mortar is prevented from being separated.
5. The construction method of the TRD cement mixing wall in the limited space as claimed in claim 1, wherein the construction method comprises the following steps: s6 still includes H shaped steel and retrieves, and H shaped steel adopts hydraulic pressure pulling machine to pull out the recovery, and the space after H shaped steel is pulled out adopts fine sand and cement thick liquid in time to backfill.
6. The construction method of the TRD cement mixing wall in the limited space as claimed in claim 1, wherein the construction method comprises the following steps: and S6, the grouting pipeline cannot be blocked in the grouting stage, the grouting phenomenon is not allowed to occur, the pile body needs to be grouted uniformly, and a soil slurry sandwich layer cannot occur. And (3) stopping the pump immediately when the pipeline is blocked, starting the stirring drilling tool immediately after the treatment is finished, stopping for about 1min, continuing grouting, and waiting for 40-60s to recover transverse stirring and cutting.
7. The construction method of the TRD cement mixing wall in the confined space as claimed in claim 1, wherein: and in the step S7, the pulling speed must be controlled when the cutting box is pulled out, so that the liquid level of the groove slurry is prevented from being reduced and the front end of the cutting box is prevented from being in a vacuum state due to the fact that the pulling speed is too high.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211426625.5A CN115977066A (en) | 2022-11-15 | 2022-11-15 | Construction method of TRD cement mixing wall in limited space |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211426625.5A CN115977066A (en) | 2022-11-15 | 2022-11-15 | Construction method of TRD cement mixing wall in limited space |
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| CN202211426625.5A Pending CN115977066A (en) | 2022-11-15 | 2022-11-15 | Construction method of TRD cement mixing wall in limited space |
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