CN114753373A - Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit - Google Patents
Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit Download PDFInfo
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- CN114753373A CN114753373A CN202210385987.8A CN202210385987A CN114753373A CN 114753373 A CN114753373 A CN 114753373A CN 202210385987 A CN202210385987 A CN 202210385987A CN 114753373 A CN114753373 A CN 114753373A
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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
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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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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Abstract
The application relates to a construction method of a water stop enclosure structure of a soft soil foundation building foundation pit, which relates to the field of foundation pit enclosure structures and aims to solve the problem of poor installation stability of a foundation pit retaining wall in the existing foundation pit water stop enclosure structure, and the construction method comprises the following steps: the method comprises the following steps: arranging a plurality of groups of supporting assemblies on a soft soil foundation of which a foundation pit needs to be excavated; step two: a foundation pit retaining wall is arranged between two adjacent groups of supporting assemblies, positioning assemblies are arranged on two sides of the foundation pit retaining wall, and the foundation pit retaining wall is reinforced through the matching of the positioning assemblies and the supporting assemblies; step three: a slag layer is arranged to bury and reinforce the supporting component; step four: the method comprises the following steps that grooves with gradually enlarged openings from bottom to top are formed in the slag layers on two sides of a foundation pit retaining wall; step five: setting homogeneous clay inside the groove and compacting and fixing; step six: and arranging a horizontal reinforcing component on the foundation pit surrounded by the foundation pit retaining wall to finish the construction of the water stop enclosure structure. This application has the effect that improves foundation ditch barricade installation stability.
Description
Technical Field
The application relates to the field of foundation pit support structures, in particular to a construction method of a water stop support structure of a soft soil foundation building foundation pit.
Background
The foundation pit is a soil pit excavated according to the elevation of a substrate and the size of a base plane in building construction, and waterproof and drainage work needs to be done after excavation.
Chinese patent application publication No. CN103866779A discloses a construction method of a water-stop enclosure structure for a soft soil foundation building foundation pit, which includes the following steps: setting a slag layer on a soft soil foundation of a foundation pit to be constructed; digging a groove downwards from the surface of the ballast layer around the edge of the foundation pit to be constructed until the depth of the dug groove reaches a low-permeability clay layer; filling homogeneous clay into the groove to form a clay waterproof curtain; installing a foundation pit retaining wall in the clay waterproof curtain, and compacting and fixing the inner side and the outer side of the foundation pit retaining wall by homogeneous clay; and arranging a horizontal support in the foundation pit surrounded by the foundation pit retaining wall to finish the construction of the water-stopping enclosure structure. The depth of the groove in the application reaches a low-permeability clay layer, so that a clay waterproof curtain is ensured to have a good waterproof effect; the clay waterproof curtain does not need a maintenance process after construction, the waterproof effect can be immediately generated after the construction is finished, the construction process is rapid and convenient, and the construction period is greatly shortened; the homogeneous clay can be excavated from the nearby place, and the construction cost is reduced.
In view of the above-mentioned related art, the inventors found that the following drawbacks exist: fill the homogeneity clay through the slot of seting up on to the ballast layer and form clay stagnant water curtain, the foundation ditch barricade is installed in clay stagnant water curtain, and is fixed with the compaction of homogeneity clay through inboard and the outside at the foundation ditch barricade, accomplishes the installation of foundation ditch barricade, but the homogeneity clay becomes soft easily after the humidity, leads to the foundation ditch barricade to install the back stability relatively poor, influences the stagnant water effect of envelope to the foundation ditch.
Disclosure of Invention
In order to improve the installation stability of the foundation pit retaining wall, the application provides a construction method of a water stop enclosure structure of a soft soil foundation building foundation pit.
The application provides a construction method of stagnant water envelope of soft soil foundation building foundation ditch adopts following technical scheme:
a construction method of a water stop enclosure structure of a soft soil foundation building foundation pit comprises the following steps:
the method comprises the following steps: a plurality of groups of supporting assemblies are arranged on a soft soil foundation where a foundation pit needs to be excavated, and a space for arranging a foundation pit retaining wall is reserved between two adjacent groups of supporting assemblies;
step two: a foundation pit retaining wall is arranged between two adjacent groups of supporting assemblies, a plurality of groups of foundation pit retaining walls surround a foundation pit excavation space, positioning assemblies are arranged on two sides of the foundation pit retaining wall, and the foundation pit retaining wall is reinforced through the matching of the positioning assemblies and the supporting assemblies;
Step three: a slag layer is arranged to bury and reinforce the supporting assembly;
step four: the method comprises the following steps that grooves with gradually enlarged openings from bottom to top are formed in the slag layers on two sides of a foundation pit retaining wall, and the bottom ends of the grooves extend into the soft soil foundation;
step five: setting homogeneous clay inside the groove and compacting and fixing;
step six: and arranging a horizontal reinforcing component on the foundation pit surrounded by the foundation pit retaining wall to finish the construction of the water stop enclosure structure.
Optionally, in the first step, the supporting component includes that installing frame and multiunit are arranged in inserting the grafting pole to soft soil foundation, the multiunit the grafting pole all sets up on the installing frame.
Through adopting above-mentioned technical scheme, the installing frame inserts the peg graft pole in the ground when the installation to can improve the stability of installing frame installation, two sets of installing frames support the both sides of foundation ditch barricade respectively, and then improve the installation stability of foundation ditch barricade.
Optionally, the supporting component further comprises a limiting cylinder and a connecting block, the limiting cylinder is coaxially sleeved outside the insertion rod, the connecting block is arranged at one end, far away from the mounting frame, of the insertion rod, a threaded hole matched with the insertion rod in a threaded connection mode is formed in the mounting frame, and the insertion rod rotates to drive the connecting block to enter the limiting cylinder to enable an end opening of the limiting cylinder to be enlarged.
Through adopting above-mentioned technical scheme, be threaded connection between peg graft pole and the installing frame, rotate the axis direction motion that the peg graft pole can drive its along the screw hole, when the peg graft pole drives the connecting block to the side motion that is close to the installing frame, the connecting block can get into in the spacing section of thick bamboo to make the tip of spacing section of thick bamboo enlarge, make the peg graft pole be difficult for extracting from the ground, further improve the installation stability of installing frame.
Optionally, the peripheral wall of the limiting cylinder is provided with a plurality of strip-shaped holes formed in the axial direction, the strip-shaped holes extend to one end, close to the end of the connecting block, of the limiting cylinder to form an opening, the diameter of the connecting block is gradually increased from one end close to the inserting rod to the end far away from the inserting rod, and the diameter of the end, far away from the inserting rod, of the connecting block is larger than that of the limiting cylinder.
Through adopting above-mentioned technical scheme, the connecting block tip is advanced to be gone into the inside of a spacing section of thick bamboo, and the rethread connecting block main aspects makes the tip expansion of a spacing section of thick bamboo, and the bar hole is seted up to the periphery wall of a spacing section of thick bamboo, makes the connecting block change after getting into a spacing section of thick bamboo and makes a spacing section of thick bamboo open to further improve the spacing effect of a spacing section of thick bamboo, with the installation effect that improves the installing frame.
Optionally, in the third step, the upper surface of the ballast layer is higher than the top of the installation frame, one end of the installation frame, which is close to the foundation pit retaining wall, extends to the outside of the ballast layer, and the positioning assembly is used for fixedly connecting the foundation pit retaining wall and the installation frame.
Through adopting above-mentioned technical scheme, the ballast layer covers the top of installing frame to make the installing frame more stable after being connected with the foundation ditch barricade, difficult emergence is not hard up in the use, and the setting of installing frame has also improved the intensity of laying on ballast layer simultaneously, and the one end that the installing frame is close to the foundation ditch barricade extends to the outside on ballast layer, is convenient for realize being connected between installing frame and the foundation ditch barricade.
Optionally, the installing frame is close to one side of foundation ditch barricade is the slope form, distance between the bottom of installing frame and the foundation ditch barricade is less than the distance between the top of installing frame and the foundation ditch barricade.
Through adopting above-mentioned technical scheme, the one side that the installing frame is close to the foundation ditch barricade is the slope form, can be convenient for connect between installing frame and the foundation ditch barricade, can upwards be under construction from the bottom of installing frame when the installation, and is convenient for excavate the slot on the ballast layer.
Optionally, in the second step, the positioning assembly comprises a plurality of groups of telescopic rods, the telescopic rods are arranged on the foundation pit retaining wall, the telescopic rods and the foundation pit retaining wall are respectively positioned at different heights on the foundation pit retaining wall, and one end, far away from the foundation pit retaining wall, of the telescopic rod is detachably connected to the mounting frame.
Through adopting above-mentioned technical scheme, the one end of telescopic link is connected on the foundation ditch barricade, and the foundation ditch barricade installation back makes the telescopic link elongate, connects the mounting frame with the telescopic link on, is convenient for realize the connection between foundation ditch barricade and the mounting frame, has improved the installation effectiveness.
Optionally, a through hole for the telescopic rod to penetrate is formed in the mounting frame, the positioning assembly further comprises a plurality of groups of positioning rods arranged on the mounting frame, and a plurality of positioning holes for the positioning rods to be inserted are formed in the telescopic rod along the axis direction.
Through adopting above-mentioned technical scheme, during the perforation on the telescopic link inserted the installing frame, insert the locating lever again in the locating hole on the telescopic link to can make stable connection between telescopic link and the installing frame, simple structure, the installation of being convenient for.
Optionally, a sliding block is arranged at one end of the positioning rod, a sliding groove matched with the sliding block in a sliding mode is formed in the mounting frame, an elastic piece is arranged between the sliding block and the mounting frame, and the elastic piece drives the sliding block to slide in the sliding groove.
Through adopting above-mentioned technical scheme, the slider is at the spout internal motion, and during the slider slided and makes the locating lever insert locating hole on the telescopic link, elastic component promoted slider and telescopic link butt to it is more stable to make to be connected between telescopic link and the locating lever, avoids causing and drops between locating lever and the locating hole, influences the installation stability of foundation ditch barricade.
Optionally, the horizontal reinforcement assembly comprises a plurality of groups of positioning sleeves and a connecting plate used for fixing two groups of adjacent positioning sleeves, the positioning sleeves are sleeved on two groups of adjacent foundation pit retaining walls, and the connecting plate and the positioning sleeves are detachably arranged.
Through adopting above-mentioned technical scheme, the position sleeve cover is located between two sets of adjacent foundation ditch barricades, and the rethread connecting plate is connected between to the position sleeve to can be convenient for restrict the distance between two sets of adjacent position sleeves, fix the top of foundation ditch barricade, thereby further improve the installation stability of foundation ditch barricade.
In summary, the present application includes at least the following advantageous technical effects:
1. the supporting component is arranged on the soft soil foundation, and the supporting component is used for supporting and fixing the installation of the foundation pit retaining wall, so that the installation stability of the foundation pit retaining wall is improved;
2. by arranging the inserting rod, the limiting cylinder and the connecting block, the inserting rod is inserted into the foundation when the mounting frame is mounted, the inserting rod is in threaded connection with the mounting frame, the inserting rod can be driven to move along the axis direction of the threaded hole by rotating the inserting rod, and when the inserting rod drives the connecting block to move towards one side close to the mounting frame, the connecting block can enter the limiting cylinder, so that the end part of the limiting cylinder is enlarged, the inserting rod is not easy to pull out of the foundation, and the mounting stability of the mounting frame is improved;
3. The one end of telescopic link is connected on the foundation ditch barricade wall, and the back is installed to the foundation ditch barricade, makes the telescopic link elongate, connects the mounting frame with the telescopic link on, is convenient for realize being connected between foundation ditch barricade and the mounting frame, and during the perforation on the mounting frame was inserted to the telescopic link, during inserting the locating hole on the telescopic link again to can make stable connection between telescopic link and the mounting frame, simple structure, simple to operate.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic structural diagram of a limiting cylinder in a front view according to an embodiment of the present application;
FIG. 4 is an enlarged view of portion B of FIG. 1;
FIG. 5 is a schematic view showing an overall structure of the connection between the telescopic rod and the mounting frame according to the embodiment of the present application;
fig. 6 is a schematic diagram showing a top view of a horizontal stiffening element according to an embodiment of the present application.
Reference numerals: 1. soft soil foundation; 2. a support assembly; 21. installing a frame; 211. a threaded hole; 212. perforating; 213. a chute; 22. a plug rod; 23. a limiting cylinder; 231. a strip-shaped hole; 24. connecting blocks; 3. retaining the wall of the foundation pit; 4. a positioning assembly; 41. a telescopic rod; 411. positioning holes; 42. positioning a rod; 43. a slider; 44. an elastic member; 5. a ballast layer; 6. a homogeneous clay; 7. a horizontal reinforcement assembly; 71. a positioning sleeve; 72. a connecting plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses a construction method of a water stop enclosure structure of a soft soil foundation building foundation pit.
Referring to fig. 1, the construction method of the water-stop enclosure structure of the soft soil foundation building foundation pit comprises the following steps:
the method comprises the following steps: a plurality of groups of supporting assemblies 2 are arranged on a soft soil foundation 1 needing to be excavated, and a space for arranging a foundation pit retaining wall 3 is reserved between two adjacent groups of supporting assemblies 2;
step two: a foundation pit retaining wall 3 is arranged between two adjacent groups of supporting assemblies 2, a plurality of groups of foundation pit retaining walls 3 surround a foundation pit excavation space, positioning assemblies 4 are arranged on two sides of each foundation pit retaining wall 3, and the foundation pit retaining walls 3 are reinforced through the cooperation of the positioning assemblies 4 and the supporting assemblies 2;
step three: a slag layer 5 is arranged to bury and reinforce the supporting component 2;
step four: the method comprises the following steps that grooves with gradually enlarged openings from bottom to top are formed in the ballast layers 5 on the two sides of the foundation pit retaining wall 3, and the bottom ends of the grooves extend into the soft soil foundation 1;
step five: setting homogeneous clay 6 inside the groove and compacting and fixing;
step six: and arranging a horizontal reinforcing component 7 on a foundation pit formed by enclosing the foundation pit retaining wall 3 to finish the construction of the water-stopping enclosure structure.
Referring to fig. 1, in actual construction, four groups of foundation pit retaining walls 3 are generally arranged and connected end to form a space for foundation pit excavation, so in step one, at least eight groups of supporting assemblies 2 are arranged, and one group of foundation pit retaining walls 3 is fixed by two groups of supporting assemblies 2.
Referring to fig. 1, in order to improve the fixing strength of the supporting component 2 to the foundation pit retaining wall 3, the supporting component 2 includes an installation frame 21 and a plurality of sets of insertion rods 22, in this embodiment, the installation frame 21 is a frame body having a certain height and an internal supporting structure to improve the overall strength of the installation frame 21, the overall structural size of the installation frame 21 is selected according to the size of the foundation pit retaining wall 3, one side of the installation frame 21 close to the foundation pit retaining wall 3 is inclined, the distance between the bottom end of the installation frame 21 and the foundation pit retaining wall 3 is smaller than the distance between the top end of the installation frame 21 and the foundation pit retaining wall 3, so that a constructor can conveniently work between the retaining wall 3 and the installation frame 21, a large space between the foundation pit and the retaining wall is not needed, construction by the constructor is not facilitated after the large space is left, the plurality of insertion rods 22 are all fixedly connected to the bottom of the installation frame 21 and perpendicular to the lower surface of the installation frame 21, the insertion rod 22 is inserted into the soft soil foundation 1, so that the installation stability of the installation frame 21 can be improved;
Referring to fig. 2-3, in order to prevent the insertion rod 22 from moving upward from the soft soil foundation 1 to cause the mounting frame 21 to become loose, the support assembly 2 further includes a limiting cylinder 23 and a connecting block 24, the limiting cylinder 23 is coaxially sleeved outside the insertion rod 22, in this embodiment, the connecting block 24 is in a circular truncated cone shape, the outer peripheral wall of the connecting block 24 is an inclined surface, the end of the connecting block 24 with a smaller diameter is coaxially and fixedly connected to the end of the insertion rod 22 away from the mounting frame 21, the diameter of the end of the connecting block 24 close to the insertion rod 22 is larger than the diameter of the limiting cylinder 23, the diameter of the end of the connecting block 24 away from the insertion rod 22 is larger than the diameter of the limiting cylinder 23, and the setting of the connecting block 24 prevents the limiting cylinder 23 from falling off the insertion rod 22; the outer peripheral wall of the insertion rod 22 is provided with an external thread, the mounting frame 21 is provided with a threaded hole 211 which is in threaded connection and adaptation with the insertion rod 22, the connecting block 24 and the limiting cylinder 23 are driven to move towards one end close to the mounting frame 21 by rotating the inserting rod 22, when one end of the limiting cylinder 23 is abutted against the mounting frame 21, the connecting block 24 enters the limiting cylinder 23 to expand the end opening, the insertion rod 22 is limited and fixed by the limiting cylinder 23, so that the insertion rod 22 is not easy to be pulled out of the foundation, in order to improve the opening expansion degree of the limiting cylinder 23, the peripheral wall of the limiting cylinder 23 is provided with a plurality of strip-shaped holes 231 arranged along the axial direction, and the strip-shaped hole 231 extends to one end of the limiting cylinder 23 close to the end part of the connecting block 24 to form an opening, so that after the connecting block 24 enters the limiting cylinder 23, the peripheral wall of the limiting cylinder 23 is more easily dispersed and opened, so that the limiting effect of the limiting cylinder 23 on the plug-in rod 22 is further improved.
Referring to fig. 1, in actual construction, after the installation of the installation frame 21 is completed, the stone slag layer 5 is laid on the soft soil foundation 1 to bury and reinforce the installation frame 21, the upper surface of the stone slag layer 5 is higher than the top of the installation frame 21, the stability of the installation frame 21 is further enhanced through the stone slag layer 5, meanwhile, the surface bearing strength of the stone slag layer 5 is also improved by the installation frame 21, one end of the installation frame 21, which is close to the foundation pit retaining wall 3, extends to the outside of the stone slag layer 5, and the installation frame 21 is convenient to connect with the foundation pit retaining wall 3.
Referring to fig. 4-5, in order to realize the connection between the foundation pit retaining wall 3 and the mounting frame 21, the bottom of the foundation pit retaining wall 3 is embedded in the soft soil foundation 1, the foundation pit retaining wall 3 is connected with the cross beam on the mounting frame 21 through the positioning component 4, two sides of the foundation pit retaining wall 3 are provided with grooves, the positioning component 4 comprises a plurality of groups of telescopic rods 41, one ends of the plurality of groups of telescopic rods 41 are hinged on the inner wall of the groove on the foundation pit retaining wall 3, so that the telescopic rods 41 can be retracted into the grooves when the foundation pit retaining wall 3 is stored or transported, the connecting positions of the plurality of groups of telescopic rods 41 and the foundation pit retaining wall 3 are respectively located at different heights on the foundation pit retaining wall 3, the specific position of the plurality of groups of telescopic rods 41 in the vertical direction corresponds to the cross beam on the mounting frame 21, one end of the telescopic rod 41 far away from the foundation pit retaining wall 3 is detachably connected to the mounting frame 21, and more telescopic rods 41 can be arranged at higher positions on the foundation pit retaining wall 3, for example, the foundation pit retaining wall 3 is connected with the bottom end of the mounting frame 21 through a group of telescopic rods 41, the foundation pit retaining wall 3 is connected with the middle part of the mounting frame 21 through two groups of telescopic rods 41, and the foundation pit retaining wall 3 is connected with the top end of the mounting frame 21 through three groups of telescopic rods 41, so that the supporting effect on the foundation pit retaining wall 3 can be improved;
In order to improve the connection efficiency between the telescopic rod 41 and the mounting frame 21, a through hole 212 for the telescopic rod 41 to penetrate is formed in a cross beam on the mounting frame 21, the telescopic rod 41 passes through the through hole 212 in the cross beam after extending, the positioning assembly 4 further comprises a sliding block 43 and a positioning rod 42, the positioning rod 42 is fixedly connected to the sliding block 43, a sliding groove 213 which is matched with the sliding block 43 in a sliding manner is formed in the cross beam, a plurality of positioning holes 411 are formed in the telescopic rod 41 along the axial direction, the positioning rod 42 can be inserted into the positioning holes 411 after the sliding block 43 slides in the sliding groove 213, so that the telescopic rod 41 is connected with the mounting frame 21, an elastic piece 44 is arranged between the sliding block 43 and the inner wall of the sliding groove 213, the sliding block 43 is driven by the elastic piece 44 to slide in the sliding groove 213, in the embodiment, the elastic piece 44 is a spring, the axial direction of the spring is the same as the length direction of the sliding groove 213, and one end of the spring is fixedly connected to the cross beam, the other end of the spring is fixedly connected to the sliding block 43, and the spring pushes the sliding block 43 to abut against the telescopic rod 41, so that the connection between the telescopic rod 41 and the positioning rod 42 is more stable, and the positioning rod 42 and the positioning hole 411 are prevented from falling off;
for further setting in order to improve the installation effectiveness between telescopic link 41 and the installing frame 21, both sides symmetry that lie in perforation 212 on the crossbeam is provided with spout 213 and slider 43, the equal fixedly connected with locating lever 42 in one side that two sets of sliders 43 are close to each other, through the mutual butt of locating lever 42 on the two sets of sliders 43 of spring drive, one side that locating lever 42 is close to perforation 212 is the inclined plane, telescopic link 41 passes behind perforation 212 with the inclined plane butt of locating lever 42, promote two sets of telescopic links 41 separation, after locating lever 42 inserts the locating hole 411 on telescopic link 41, can fix telescopic link 41, slider 43 can slide automatically so that locating lever 42 inserts in the locating hole 411 on telescopic link 41, make the connection between telescopic link 41 and the installing frame 21 more convenient.
Referring to fig. 1, after the foundation pit retaining wall 3 is connected with the mounting frame 21, a groove with a gradually enlarged opening from bottom to top is formed in one side, close to the foundation pit retaining wall 3, of the ballast layer 5, the bottom end of the groove extends to the inside of the soft soil foundation 1, homogeneous clay 6 is arranged in the groove and is compacted and fixed, the homogeneous clay 6 supports and fixes the two sides of the foundation pit retaining wall 3, and the homogeneous clay 6 can select soil near the soft soil foundation 1, so that the foundation pit retaining wall 3 can play a good water stopping effect.
Referring to fig. 6, the top of the four groups of foundation pit retaining walls 3 is further reinforced and fixed at the end of construction, the horizontal reinforcing assembly 7 comprises a plurality of groups of positioning sleeves 71 and connecting plates 72, the positioning sleeves 71 are sleeved between two adjacent groups of foundation pit retaining walls 3, positioning grooves with right angles are formed in the bottoms of the positioning sleeves 71, the foundation pit retaining walls 3 are embedded in the positioning grooves, the connecting plates 72 and the positioning sleeves 71 are detachably arranged, the connecting plates 72 are used for fixing the two adjacent groups of positioning sleeves 71, threaded rods are fixedly connected to the positioning sleeves 71, strip-shaped holes 231 are formed in the connecting plates 72, the threaded rods penetrate through the strip-shaped holes 231 during installation of the connecting plates 72, nuts are installed on the threaded rods, the nuts are abutted to the connecting plates 72, and the relative positions of the connecting plates 72 and the positioning sleeves 71 are fixed.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A construction method of a water stop enclosure structure of a soft soil foundation building foundation pit is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: a plurality of groups of supporting assemblies (2) are arranged on a soft soil foundation (1) needing to excavate a foundation pit, and a space for arranging a foundation pit retaining wall (3) is reserved between two adjacent groups of supporting assemblies (2);
step two: a foundation pit retaining wall (3) is arranged between two adjacent groups of supporting assemblies (2), a plurality of groups of foundation pit retaining walls (3) surround a foundation pit excavation space, positioning assemblies (4) are arranged on two sides of each foundation pit retaining wall (3), and the foundation pit retaining walls (3) are reinforced through the matching of the positioning assemblies (4) and the supporting assemblies (2);
step three: a slag layer (5) is arranged to bury and reinforce the supporting component (2);
step four: a groove with a gradually enlarged opening from bottom to top is formed in the ballast layer (5) on two sides of the foundation pit retaining wall (3), and the bottom end of the groove extends into the soft soil foundation (1);
Step five: setting homogeneous clay (6) in the groove and compacting and fixing;
step six: and arranging a horizontal reinforcing component (7) on the foundation pit surrounded by the foundation pit retaining wall (3) to finish the construction of the water stopping enclosure structure.
2. The construction method of the water-stop building envelope of the soft soil foundation building foundation pit according to claim 1, characterized in that: in the first step, the supporting component (2) comprises an installation frame (21) and a plurality of groups of inserting rods (22) used for being inserted into the soft soil foundation (1), and the plurality of groups of inserting rods (22) are arranged on the installation frame (21).
3. The construction method of the water-stop building envelope of the soft soil foundation building foundation pit according to claim 2, characterized in that: the supporting component (2) further comprises a limiting cylinder (23) and a connecting block (24), the limiting cylinder (23) is coaxially sleeved on the outer portion of the inserting rod (22), the connecting block (24) is arranged at one end, far away from the inserting rod (22), of the mounting frame (21), a threaded hole (211) matched with the inserting rod (22) in a threaded connection mode is formed in the mounting frame (21), and the inserting rod (22) rotates to drive the connecting block (24) to enter the limiting cylinder (23) to enable an end opening of the limiting cylinder to be enlarged.
4. A method of constructing a water-stopping envelope for a soft soil foundation construction foundation pit according to claim 3, wherein: the periphery wall of the limiting barrel (23) is provided with a plurality of strip-shaped holes (231) formed along the axis direction, the strip-shaped holes (231) extend to one end, close to the end of the connecting block (24), of the limiting barrel (23) to form an opening, the diameter of the connecting block (24) is gradually increased from one end close to the inserting rod (22) to the end far away from the inserting rod (22), and the diameter of the end, far away from the inserting rod (22), of the connecting block (24) is larger than that of the limiting barrel (23).
5. The construction method of the water-stop envelope structure of the soft soil foundation building foundation pit according to claim 2, characterized in that: in the third step, the upper surface of ballast layer (5) is higher than the top of installing frame (21), the one end that installing frame (21) is close to foundation ditch barricade (3) extends to the outside of ballast layer (5), locating component (4) are used for fixed connection foundation ditch barricade (3) and installing frame (21).
6. A construction method of a water stop enclosure structure of a soft soil foundation building foundation pit according to claim 5, characterized in that: the utility model discloses a foundation ditch retaining wall, including installing frame (21), foundation ditch retaining wall (3), distance between the bottom of installing frame (21) and foundation ditch retaining wall (3) is less than the distance between the top of installing frame (21) and foundation ditch retaining wall (3).
7. A construction method of a water stop enclosure structure of a soft soil foundation building foundation pit according to claim 5, characterized in that: in the second step, locating component (4) includes multiunit telescopic link (41), multiunit telescopic link (41) all set up in on foundation ditch barricade (3), the multiunit telescopic link (41) are located the different height on foundation ditch barricade (3) respectively with the hookup location of foundation ditch barricade (3), telescopic link (41) keep away from the one end of foundation ditch barricade (3) can dismantle connect in on installing frame (21).
8. A method of constructing a water-stopping envelope for a soft soil foundation construction foundation pit according to claim 7, wherein: the mounting frame (21) is provided with a through hole (212) for the telescopic rod (41) to penetrate through, the positioning assembly (4) further comprises a plurality of groups of positioning rods (42) arranged on the mounting frame (21), and a plurality of positioning holes (411) for the positioning rods (42) to be inserted and connected are distributed in the telescopic rod (41) along the axis direction.
9. The construction method of the water-stop envelope structure of the soft soil foundation building foundation pit according to claim 8, characterized in that: one end of the positioning rod (42) is provided with a sliding block (43), the mounting frame (21) is provided with a sliding groove (213) which is matched with the sliding block (43) in a sliding mode, an elastic piece (44) is arranged between the sliding block (43) and the mounting frame (21), and the elastic piece (44) drives the sliding block (43) to slide in the sliding groove (213).
10. The construction method of the water-stop envelope structure of the soft soil foundation building foundation pit according to claim 1, characterized in that: horizontal reinforcement subassembly (7) supporting component (2) include multiunit position sleeve (71) and be used for connecting plate (72) of fixed two sets of adjacent position sleeve (71), two sets of adjacent are located to position sleeve (71) cover between foundation ditch barricade (3), connecting plate (72) and position sleeve (71) can dismantle the setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210385987.8A CN114753373B (en) | 2022-04-13 | 2022-04-13 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
Applications Claiming Priority (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116005701A (en) * | 2023-01-06 | 2023-04-25 | 江苏力迈建设工程有限公司 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
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| CN1563606A (en) * | 2004-04-09 | 2005-01-12 | 南京大学 | Method for supporting foundation trench for agitation piles of soil cement with concrete as the core |
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| CN116005701B (en) * | 2023-01-06 | 2023-10-24 | 江苏力迈建设工程有限公司 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
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| CN114753373B (en) | 2022-11-11 |
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