CN112921978A - Excavation construction structure and method for small foundation pit close to excavated main foundation pit - Google Patents
Excavation construction structure and method for small foundation pit close to excavated main foundation pit Download PDFInfo
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- CN112921978A CN112921978A CN202110104975.9A CN202110104975A CN112921978A CN 112921978 A CN112921978 A CN 112921978A CN 202110104975 A CN202110104975 A CN 202110104975A CN 112921978 A CN112921978 A CN 112921978A
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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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Abstract
The utility model relates to a close on little foundation ditch excavation construction structures who excavates main foundation ditch relates to the field of construction research, and it includes main foundation ditch and digs the little foundation ditch of establishing near main foundation ditch, one side demountable installation that main foundation ditch inner wall is close to little foundation ditch has reinforcing apparatus, and reinforcing apparatus includes stand, guard plate, retaining member and positioning bolt, and the stand branch is located the both sides of main foundation ditch inner wall, and positioning bolt passes the stand and is fixed in main foundation ditch lateral wall, and the mounting groove has been seted up to one side that the stand deviates from little foundation ditch, and the both sides of guard plate are inserted and are located the mounting groove and slide continuously with the stand, and the retaining member can be dismantled to set up on the stand and. This application has the effect of strengthening the protection to main pit structural strength.
Description
Technical Field
The application relates to the field of building construction research, in particular to a small foundation pit excavation construction structure and method close to an excavated deep foundation pit.
Background
The foundation pit is a soil pit excavated at the design position of the foundation according to the elevation of the foundation and the plane size of the foundation. Before excavation, an excavation scheme is determined according to geological and hydrological data and the conditions of buildings nearby the site, and waterproof drainage work is well done.
Along with the development of urban construction, the foundation pit is often influenced by factors such as traffic fluffing and pipeline moving and changing during construction, so that the local part of the foundation pit can not be constructed, the foundation pit can be divided into two or even a plurality of foundation pits for construction only by using the temporary isolation piles, and after the traffic fluffing or pipeline problem is solved, the main foundation pit is excavated and each layer of support construction is completed. According to the conventional construction method, the adjacent small foundation pits can only be excavated after the main foundation pit is excavated and the main structure is constructed, and the two parts of columns are connected in a reinforcing steel bar straight thread joint mode.
In view of the above-mentioned related technologies, the inventor believes that when a small foundation pit is constructed after the construction of a main foundation pit is completed, the soil foundation on the side of the small foundation pit adjacent to the main foundation pit can generate large vibration, which affects the strength of the main foundation pit structure.
Disclosure of Invention
In order to strengthen the protection to the structural strength of the main foundation pit, the application provides a small foundation pit excavation construction structure close to an excavated main foundation pit and a method.
In a first aspect, the application provides a little foundation ditch excavation construction structures who closes on main foundation ditch excavated adopts following technical scheme:
the utility model provides a close on little foundation ditch excavation construction structures who excavates main foundation ditch, include main foundation ditch and dig the little foundation ditch of establishing near main foundation ditch, one side demountable installation that main foundation ditch inner wall is close to little foundation ditch has reinforcing apparatus, reinforcing apparatus includes stand, guard plate, retaining member and positioning bolt, the stand divides the both sides of locating main foundation ditch inner wall, positioning bolt passes the stand and is fixed in main foundation ditch lateral wall, the mounting groove has been seted up to one side that the stand deviates from little foundation ditch, the both sides of guard plate are inserted and are located the mounting groove and slide continuously with the stand, the retaining member can be dismantled and set up on the stand and carry on spacingly to the.
By adopting the technical scheme, when the small foundation pit is excavated near the main foundation pit, the two stand columns are firstly respectively arranged at two sides of the main foundation pit close to the inner wall of one side of the small foundation pit to be excavated, the positioning bolts penetrate through the stand columns and extend into the side wall to fix the stand columns, then two ends of the protection plate are arranged in the mounting grooves of the two stand columns, one side of the protection plate close to the side wall of the main foundation pit is abutted against the inner wall of the main foundation pit, the stand columns are matched with the protection plate to form a reinforcing effect on the inner wall of the main foundation pit, the strength of the inner wall of the main foundation pit is improved when the small foundation pit is excavated, the collapse condition in the main foundation pit is prevented, the protection plate can slide along the mounting grooves of the stand columns, the distance of the protection plate on the stand columns can be conveniently moved along with the excavation of the depths of the main, after the guard plate removed to the assigned position, used the retaining member to fix the guard plate in a certain position of stand, improved the stability of guard plate in the use, reached the protection effect that improves main foundation pit structural strength.
Preferably, the locking part comprises a locking plate, a locking screw and a butting plate, the locking plate is arranged in an L shape, one end of the locking plate is butted with the side wall of the upright post, and the other end of the locking plate is erected on the mounting groove of the upright post; the locking screw penetrates through the locking plate and extends into the mounting groove, and the locking screw is in threaded connection with the locking plate; the butt plate is arranged at the bottom of the locking screw rod and is rotationally connected with the locking screw rod, and one side of the butt plate, which is away from the locking screw rod, is abutted against the protection plate.
Through adopting above-mentioned technical scheme, when using this retaining member spacing to the guard plate, install the locking board to the stand on, then rotatory locking screw, locking screw promote the butt board get into the mounting groove and with the guard plate butt, the pressure of locking screw cooperation butt board is fixed the guard plate, realizes the spacing effect of guard plate, easy operation, convenient to use.
Preferably, the locking plate is fixedly connected with a locking clamping strip integrally at one side abutted against the upright column, a groove is formed in the position, corresponding to the locking clamping strip, of the upright column, and the locking clamping strip is embedded in the groove and forms clamping connection with the groove.
Through adopting above-mentioned technical scheme, when installing the retaining member on to the stand, in arranging the locking card strip on the locking plate in the recess of stand, make locking card strip and recess form the joint, promote the stability of retaining member installation on the stand, further improve the result of use of retaining member.
Preferably, a sliding groove is formed in the position, opposite to the groove, of the mounting groove, and two ends of the abutting plate are inserted into the sliding groove and clamped with the sliding groove.
Through adopting above-mentioned technical scheme, when locking bolt promoted the butt board and carries out the butt to the guard plate, make the butt board move along the spout in the mounting groove, the spout plays the effect of guide to the butt board on the one hand, and the butt board sets up with the joint of spout simultaneously, and further reinforcing will be retaining member and stand be connected stability, the result of use of reinforcing retaining member.
Preferably, the butt plate includes arc and the extension board of rigid coupling in arc both ends, and the arc rotates with locking screw and links to each other, and the extension board is inserted and is located in the spout and form the joint with the spout.
Through adopting above-mentioned technical scheme, the butt includes arc and extension, and the extension is inserted and is located the spout, promotes the stability that the butt used, arc and guard plate direct contact, the area of contact of arc increase and guard plate increase the frictional force between butt and the guard plate, further promotes the fixed effect to the guard plate.
Preferably, the protection plate comprises a reinforcing plate, an auxiliary plate, a connecting plate and a connecting pipe, the auxiliary plate is respectively arranged at two ends of the reinforcing plate and fixedly connected with the reinforcing plate, one end of the auxiliary plate, far away from the reinforcing plate, is obliquely and outwards arranged towards the direction far away from the center of the reinforcing plate, the connecting plate is fixedly connected at one end of the auxiliary plate, far away from the reinforcing plate, and is arranged parallel to the reinforcing plate, the connecting pipe is fixedly connected at one end of the connecting plate, far away from the auxiliary plate, and the axis of the connecting pipe is consistent with the extending direction of the mounting.
Through adopting above-mentioned technical scheme, the guard plate includes the gusset plate, the accessory plate, connecting plate and connecting pipe, the accessory plate slope sets up, the area of contact of increase guard plate and main foundation ditch inner wall, increase the control range to main foundation ditch inner wall, the lateral wall intensity of main foundation ditch when improving the excavation little foundation ditch, the connecting pipe is inserted in the mounting groove of locating the stand simultaneously and is slided with the mounting groove and link to each other, promote convenience and the high efficiency of guard plate when removing on the stand, further improve the result of use of guard plate.
Preferably, a reinforcing rib is fixedly connected to one side of the reinforcing plate, which is opposite to the upright post, and the extending direction of the reinforcing rib is consistent with the extending direction of the reinforcing plate.
Through adopting above-mentioned technical scheme, the gusset plate just sets up the strengthening rib to main pit inner wall one side at gusset plate and main pit inner wall direct contact, promotes the intensity of gusset plate on the one hand, improves the stability when the gusset plate uses, further increases the area of contact of gusset plate and main pit inner wall simultaneously, reinforcing gusset plate's result of use.
Preferably, the top rigid coupling of stand has first connecting piece, the bottom rigid coupling has the second connecting piece, and the first connecting piece and the second connecting piece joint of adjacent stand link to each other.
Through adopting above-mentioned technical scheme, along with the deep-cut of main foundation pit and little foundation ditch, the reinforcing apparatus of main foundation pit inner wall is installed gradually, and the first connecting piece that will install the stand after is connected with the second connecting piece of fixed stand, then uses positioning bolt to fix the stand of back installation, promotes adjacent column mouting's stability, strengthens the result of use of stand.
Preferably, it is adjacent first connecting piece and the second connecting piece position department of stand are provided with the reinforcement, and the reinforcement includes fixed solid and the pull ring that links to each other, and the solid cover is established on first connecting piece, the second connecting piece of adjacent stand and is formed the joint to first connecting piece, second connecting piece.
Through adopting above-mentioned technical scheme, after the first connecting piece of adjacent stand and the installation of second connecting piece, will add the solid and insert the hookup location department of locating first connecting piece and second connecting piece simultaneously, further strengthen the connection between the adjacent stand, promote the connection stability between the first connecting piece of adjacent stand, the second connecting piece, further strengthen the result of use of stand.
In a second aspect, the present application provides a small foundation pit excavation construction structure and method near an excavated main foundation pit, including the following steps:
s1, firstly, installing an upright column on one side of the main foundation pit close to the small foundation pit, penetrating the upright column through a positioning bolt and extending and inserting the positioning bolt into the side wall of the main foundation pit to fix the upright column;
s2, inserting connecting pipes at two ends of the protection plate into the mounting grooves of the upright posts at two sides, sliding the protection plate to a specified position, and enabling one side of the protection plate close to the inner wall of the main foundation pit to be abutted against the inner wall;
s3, mounting the locking piece on the upright post, embedding the locking clamping strip in the groove, rotating the locking bolt, and pushing the abutting plate to move towards the direction close to the connecting pipe and abut against the connecting pipe by the locking bolt;
s4, continuously installing a reinforcing device along with the deep excavation of the main foundation pit and the small foundation pit, so that the first connecting piece of the post-installation upright post is clamped with the second connecting piece of the fixed upright post, and the assembly of the post-installation upright post and the fixed upright post is completed;
s5, finally, sleeving the reinforcing body of the reinforcing member at the connecting position of the first connecting piece and the second connecting piece of the adjacent upright post, and enabling the reinforcing member to be clamped with the first connecting piece and the second connecting piece of the adjacent upright post.
By adopting the technical scheme, the upright posts are installed at two ends of the inner wall of the main foundation pit close to one side of the small foundation pit, the positioning bolts penetrate through the upright posts and extend into the side wall of the main foundation pit, so that the upright posts are fixed, and the stability of the upright posts in use is improved; then inserting connecting pipes at two ends of the protection plate into the mounting grooves of the stand columns at two sides, fixing the protection plate and the stand columns by using a locking part after the protection plate slides to a specified position along the mounting grooves, ensuring the stability of the protection plate on the stand columns, and meanwhile enabling one side of the protection plate close to the inner wall of the main foundation pit to be abutted against the inner wall of the main foundation pit so as to enhance the protection effect of the protection plate on the inner wall of the main foundation pit; when the protective plate and the upright post are fixed by using the locking part, the locking clamping strip of the locking part is embedded in the groove of the upright post, and the extending plate of the abutting plate is inserted in the sliding groove of the mounting groove, so that the stability of the locking part in the use process is improved; secondly, excavating the small foundation pit, continuously installing a reinforcing device along with deep excavation of the main foundation pit and the small foundation pit, and enabling the first connecting piece and the second connecting piece of the adjacent stand columns to be clamped, so that the connection stability between the adjacent stand columns is improved, and the use effect of the protection plate on the stand columns is ensured; and finally, reinforcing the connecting position of the first connecting piece and the second connecting piece of the adjacent stand column by using the reinforcing piece, further improving the connection stability between the first connecting piece and the second connecting piece of the adjacent stand column, enhancing the use strength of the stand column and achieving the effect of promoting the protection of the structural strength of the main foundation pit.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the reinforcing device is arranged on one side, close to the small foundation pit, of the inner wall of the main foundation pit, and has a certain protection effect on the inner wall of the main foundation pit, so that the protection effect on the structural strength of the main foundation pit is improved;
2. the protective plate and the upright post are reinforced by using the locking piece, so that the limiting effect of the protective plate is realized, and the stability of the limiting plate in the using process is improved;
3. set up first connecting piece, bottom through the top at the stand and set up the second connecting piece, make the first connecting piece and the second connecting piece joint of adjacent stand link to each other, promote adjacent column erection's agility and stability, the result of use of reinforcing stand.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
FIG. 2 is a schematic structural view of the reinforcement device of the present application;
FIG. 3 is a schematic view of a structure intended to highlight a stiffener;
FIG. 4 is a schematic view of a structure intended to highlight the retaining member;
fig. 5 is a schematic structural view of the guard plate of the present application.
Description of reference numerals: 1. a main foundation pit; 2. a small foundation pit; 3. a reinforcement device; 31. a column; 311. a groove; 32. a protection plate; 321. a reinforcing plate; 322. an auxiliary plate; 323. a connecting plate; 324. a connecting pipe; 33. a locking member; 331. a locking plate; 3311. locking the clamping strip; 332. locking the bolt; 333. a butt joint plate; 3331. an arc-shaped plate; 3332. an extension plate; 34. positioning the bolt; 4. mounting grooves; 41. a chute; 5. reinforcing ribs; 6. a first connecting member; 7. a second connecting member; 8. a reinforcement; 81. reinforcing the body; 82. and (4) a pull ring.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses a small foundation pit excavation construction structure close to an excavated main foundation pit. Referring to fig. 1, a close on little foundation ditch excavation construction structures who excavates main foundation ditch, include main foundation ditch 1 and dig and establish the little foundation ditch 2 near main foundation ditch 1, one side demountable installation that main foundation ditch 1 inner wall is close to little foundation ditch 2 has reinforcing apparatus 3, and reinforcing apparatus 3 has certain guard action to main foundation ditch 1 inner wall, reaches the effect that improves the protection of main foundation ditch 1 structural strength.
With reference to fig. 1 and 2, the reinforcing device 3 includes a column 31, a protection plate 32 and a positioning bolt 34, and when excavating the small foundation pit 2 near the main foundation pit 1, the column 31 is vertically installed at two ends of the inner wall of the main foundation pit 1 near the small foundation pit 2, and the positioning bolt 34 is used to penetrate the column 31 and continuously extend into the side wall of the main foundation pit 1, so as to fix the column 31. Mounting groove 4 has been seted up to one side that stand 31 deviates from little foundation ditch 2, and mounting groove 4 sets up along the extending direction of stand 31, inserts the both ends of guard plate 32 and locates in mounting groove 4 to make guard plate 32 just to one side and the main foundation ditch 1 inner wall butt of stand 31, strengthen the fixed of guard plate 32 to main foundation ditch 1 lateral wall, promote the stability of main foundation ditch 1 lateral wall when little foundation ditch 2 excavates.
With reference to fig. 3 and 4, the reinforcing apparatus 3 further includes a locking member 33 for reinforcing the protection plate 32 and the upright post 31, the locking member 33 includes a locking plate 331, a locking screw and a butting plate 333, the locking plate 331 is disposed in an L shape, one side of the locking plate 331 close to the upright post 31 is integrally and fixedly connected with a locking clamping strip 3311, one side of the upright post 31 facing the locking clamping strip 3311 is provided with a plurality of grooves 311 adapted to be clamped with the locking clamping strip 3311, and the plurality of grooves 311 are disposed at intervals along the extending direction of the upright post 31; the locking screw rod passes through the locking plate 331 and is in threaded connection with the locking plate 331; the abutting plate 333 comprises an arc-shaped plate 3331 and extension plates 3332 fixedly connected to two ends of the arc-shaped plate 3331, the arc-shaped plate 3331 is rotatably connected with the locking screw, the position of the installation groove 4 facing the groove 311 is horizontally provided with a sliding groove 41, and the extension plates 3332 are inserted into the sliding groove 41 and clamped with the sliding groove 41.
With reference to fig. 3 and 4, when the retaining member 33 is used for limiting the protective plate 32 and the upright post 31, firstly, the protective plate 32 slides to a specified position on the upright post 31, it is ensured that the side wall of the main foundation pit 1 at the excavation position of the small foundation pit 2 forms a protective effect, then the locking clamping strip 3311 on the locking plate 331 is embedded in the groove 311 on the upright post 31, the locking plate 331 and the upright post 31 are clamped, then the locking screw is rotated, the locking screw pushes the abutting plate 333 to enter the installation groove 4 and move towards the direction close to the protective plate 32 until abutting against the protective plate 32, the extending plate 3332 of the abutting plate 333 slides in the sliding groove 41, the sliding groove 41 plays a role in guiding and supporting the abutting plate 333, and the stability of the retaining member 33 in the using process is further improved. The retaining member 33 strengthens being connected between guard plate 32 and the stand 31, improves the stability of guard plate 32 in the use, improves the guard effect of main foundation ditch 1 lateral wall.
Referring to fig. 4 and 5, the shielding plate 32 includes a reinforcing plate 321, auxiliary plates 322, connecting plates 323, and connecting pipes 324, the auxiliary plates 322 are respectively provided at both ends of the reinforcing plate 321 and fixedly connected to the reinforcing plate 321, and one end of the auxiliary plate 322 remote from the reinforcing plate 321 is disposed obliquely outward toward the direction remote from the center of the reinforcing plate 321, the connecting plate 323 is fixed to one end of the auxiliary plate 322 remote from the reinforcing plate 321 and disposed parallel to the reinforcing plate 321, and the connecting plate 323 is provided with a preformed hole for the abutting plate 333 to pass through, the connecting pipe 324 is fixedly connected to one end of the connecting plate 323 far away from the auxiliary plate 322, and the axis of the connecting pipe 324 is consistent with the extending direction of the mounting groove 4, the connecting pipe 324 is in direct contact with the arc-shaped plate 3331 of the abutting plate 333, the contact area between the arc-shaped plate 3331 and the connecting pipe 324 is increased, the friction force between the abutting plate 333 and the protection plate 32 is increased, and the fixing effect of the protection plate 32 is further improved.
Combine fig. 4 and fig. 5, gusset plate 321, accessory plate 322 and connecting plate 323 are mutually supported, the area of contact of increase guard plate 32 and 1 inner wall of main foundation ditch, increase the control range of guard plate 32 to main foundation ditch 1, promote the lateral wall intensity of main foundation ditch 1 when excavating little foundation ditch 2, gusset plate 321 is just to one side rigid coupling of stand 31 has strengthening rib 5 simultaneously, the extending direction of strengthening rib 5 keeps unanimous with the extending direction of gusset plate 321, strengthening rib 5 promotes the intensity of gusset plate 321 when using on the one hand, strengthen the stability in use of gusset plate 321, on the other hand strengthening rib 5 further increases the area of contact of gusset plate 321 and 1 inner wall of main foundation ditch, strengthen the result of use of gusset plate 321.
Referring back to fig. 3, a first connecting piece 6 is fixedly connected to the top of the upright column 31, a second connecting piece 7 is fixedly connected to the bottom of the upright column 31, the first connecting piece 6 is arranged in a T shape, the second connecting piece 7 is arranged in an annular shape with an opening, the reinforcing device 3 in the main foundation pit 1 is gradually installed along with the deep excavation of the main foundation pit 1 and the small foundation pit 2, the first connecting piece 6 of the post-installed upright column 31 is clamped with the second connecting piece 7 of the fixed upright column 31, then the post-installed upright column 31 is fixed by using a fixing bolt, the installation stability of the adjacent upright columns 31 is improved, and the strength of the side wall of the main foundation pit 1 is enhanced; in addition, the first connecting piece 6 of adjacent stand 31, the hookup location department of second connecting piece 7 is provided with reinforcement 8, reinforcement 8 includes reinforcement 81 and pull ring 82, reinforcement 81 is the E type setting, treat after the first connecting piece 6 of adjacent stand 31, second connecting piece 7 joint, handheld pull ring 82, insert reinforcement 81 and locate in the gap of first connecting piece 6 and second connecting piece 7, further strengthen the connection between the adjacent stand 31, promote the connection stability between the first connecting piece 6 of adjacent stand 31, the second connecting piece 7, further strengthen the result of use of stand 31.
The implementation principle of the small foundation pit excavation construction structure close to the excavated main foundation pit in the embodiment of the application is as follows: firstly, the upright post 31 is installed and fixed in the main foundation pit 1, then the protection plate 32 is installed on the upright post 31, the connecting pipe 324 of the protection plate 32 is clamped with the installation groove 4 of the upright post 31, the protection plate 32 and the upright post 31 are reinforced by using the locking piece 33, the stability of the protection plate 32 on the upright post 31 is improved, meanwhile, the locking clamping strip 3311 of the locking piece 33 is embedded in the groove 311 of the upright post 31, the extending plate 3332 of the abutting plate 333 is inserted in the sliding groove 41 of the installation groove 4, and the stability of the locking piece 33 is improved in the use process; then excavate little foundation ditch 2, along with main foundation ditch 1, the deep excavation of little foundation ditch 2, continuation installation reinforcing apparatus 3 to make the first connecting piece 6 and the second connecting piece 7 of adjacent stand 31 form the joint, improve the connection stability between the adjacent stand 31, ensure the result of use of guard plate 32 on stand 31, reach the effect that promotes 1 structural strength protection of main foundation ditch.
The embodiment of the application also discloses a small foundation pit excavation construction method close to the excavated main foundation pit, which comprises the following steps:
s1, firstly, installing the upright column 31 at one side of the main foundation pit 1 close to the small foundation pit 2, penetrating the upright column 31 by using the positioning bolt 34 and extending and inserting the upright column into the side wall of the main foundation pit 1 to fix the upright column 31;
s2, inserting the connecting pipes 324 at the two ends of the protection plate 32 into the mounting grooves 4 of the upright columns 31 at the two sides, sliding the protection plate 32 to a specified position, and enabling one side, close to the inner wall of the main foundation pit 1, of the protection plate 32 to be abutted against the inner wall;
s3, mounting the locking member 33 on the upright 31, inserting the locking bar 3311 into the groove 311, and rotating the locking bolt 332, wherein the locking bolt 332 pushes the abutting plate 333 to move toward the connecting tube 324 and abut against the connecting tube 324;
s4, continuously installing the reinforcing device 3 along with the deep excavation of the main foundation pit 1 and the small foundation pit 2, enabling the first connecting piece 6 of the post-installation upright post 31 to be clamped with the second connecting piece 7 of the fixed upright post 31, and completing the assembly of the post-installation upright post 31 and the fixed upright post 31;
and S5, finally, sleeving the reinforcing body 81 of the reinforcing member 8 at the connecting position of the first connecting piece 6 and the second connecting piece 7 of the adjacent upright column 31, so that the reinforcing member 8 is clamped with the first connecting piece 6 and the second connecting piece 7 of the adjacent upright column 31.
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. The utility model provides a close on little foundation ditch excavation construction structures who excavates main foundation ditch, includes main foundation ditch (1) and digs and establish little foundation ditch (2) near main foundation ditch (1), its characterized in that: one side demountable installation that main foundation ditch (1) inner wall is close to little foundation ditch (2) has reinforcing apparatus (3), reinforcing apparatus (3) are including stand (31), guard plate (32), retaining member (33) and positioning bolt (34), the both sides of main foundation ditch (1) inner wall are located in stand (31) branch, positioning bolt (34) pass stand (31) and are fixed in main foundation ditch (1) lateral wall, mounting groove (4) have been seted up to one side that stand (31) deviate from little foundation ditch (2), the both sides of guard plate (32) are inserted and are located in mounting groove (4) and slide with stand (31) and link to each other, retaining member (33) can be dismantled and set up on stand (31) and carry on spacingly to guard plate (32).
2. The excavation construction structure of a small foundation pit adjacent to an excavated main foundation pit according to claim 1, wherein: the locking piece (33) comprises a locking plate (331), a locking screw and a butt joint plate (333), the locking plate (331) is arranged in an L shape, one end of the locking plate (331) is butted with the side wall of the upright post (31), and the other end of the locking plate (331) is erected on the mounting groove (4) of the upright post (31); the locking screw rod penetrates through the locking plate (331) and extends into the mounting groove (4) to be arranged, and the locking screw rod is in threaded connection with the locking plate (331); the abutting plate (333) is arranged at the bottom of the locking screw rod and is rotationally connected with the locking screw rod, and one side, deviating from the locking screw rod, of the abutting plate (333) abuts against the protection plate (32).
3. A excavation construction structure for a small foundation pit adjacent to an excavated main foundation pit according to claim 2, wherein: the locking plate (331) is fixedly connected with a locking clamping strip (3311) in one side of the upright column (31) in an integrated mode, a groove (311) is formed in the position, corresponding to the locking clamping strip (3311), of the upright column (31), and the locking clamping strip (3311) is embedded in the groove (311) and is clamped with the groove (311).
4. A excavation construction structure for a small foundation pit adjacent to an excavated main foundation pit according to claim 3, wherein: the mounting groove (4) is horizontally opposite to the groove (311) and is provided with a sliding groove (41), and two ends of the abutting plate (333) are inserted into the sliding groove (41) and are clamped with the sliding groove (41).
5. A excavation construction structure for a small foundation pit adjacent to an excavated main foundation pit according to claim 4, wherein: butt joint board (333) include arc (3331) and rigid coupling in extension board (3332) at arc (3331) both ends, and arc (3331) rotate with locking screw and link to each other, and extension board (3332) insert locate spout (41) in and form the joint with spout (41).
6. The excavation construction structure of a small foundation pit adjacent to an excavated main foundation pit according to claim 1, wherein: the protection plate (32) comprises a reinforcing plate (321), an auxiliary plate (322), a connecting plate (323) and a connecting pipe (324), wherein the auxiliary plate (322) is respectively arranged at two ends of the reinforcing plate (321) and fixedly connected with the reinforcing plate (321), one end of the auxiliary plate (322), which is far away from the reinforcing plate (321), is obliquely and outwards arranged towards the direction far away from the center of the reinforcing plate (321), the connecting plate (323) is fixedly connected with one end of the auxiliary plate (322), which is far away from the reinforcing plate (321), and is arranged parallel to the reinforcing plate (321), the connecting pipe (324) is fixedly connected with one end of the connecting plate (323), which is far away from the auxiliary plate (322), and the axis of the connecting pipe (324) is kept consistent with the extending direction of the mounting groove (4.
7. The excavation construction structure of a small foundation pit adjacent to an excavated main foundation pit, according to claim 6, wherein: reinforcing ribs (5) are fixedly connected to one side, opposite to the upright posts (31), of the reinforcing plate (321), and the extending direction of the reinforcing ribs (5) is consistent with the extending direction of the reinforcing plate (321).
8. The excavation construction structure of a small foundation pit adjacent to an excavated main foundation pit according to claim 1, wherein: the top rigid coupling of stand (31) has first connecting piece (6), the bottom rigid coupling has second connecting piece (7), and first connecting piece (6) and second connecting piece (7) joint of adjacent stand (31) link to each other.
9. The excavation construction structure of a small foundation pit adjacent to an excavated main foundation pit according to claim 1, wherein: adjacent first connecting piece (6) and second connecting piece (7) position department of stand (31) are provided with reinforcement (8), and reinforcement (8) are including fixed reinforcement body (81) and pull ring (82) that link to each other, and reinforcement body (81) cover is established on first connecting piece (6), second connecting piece (7) of adjacent stand (31) and is formed the joint to first connecting piece (6), second connecting piece (7).
10. A method of constructing a excavation structure for a small excavation adjacent to an excavated main excavation according to any one of claims 1 to 9, comprising the steps of:
s1, firstly, installing an upright post (31) at one side of the main foundation pit (1) close to the small foundation pit (2), and penetrating the upright post (31) by using a positioning bolt (34) and extending and inserting the positioning bolt into the side wall of the main foundation pit (1) to fix the upright post (31);
s2, inserting connecting pipes (324) at two ends of the protection plate (32) into the mounting grooves (4) of the upright posts (31) at two sides, sliding the protection plate (32) to a specified position, and enabling one side, close to the inner wall of the main foundation pit (1), of the protection plate (32) to be abutted against the inner wall;
s3, mounting the locking piece (33) on the upright post (31), embedding the locking clamping strip (3311) in the groove (311), rotating the locking bolt (332), and pushing the abutting plate (333) to move towards the direction close to the connecting pipe (324) and abut against the connecting pipe (324) by the locking bolt (332);
s4, continuously installing a reinforcing device (3) along with the deep excavation of the main foundation pit (1) and the small foundation pit (2), and enabling a first connecting piece (6) of the post-installation upright post (31) to be clamped with a second connecting piece (7) of the fixed upright post (31) to complete the assembly of the post-installation upright post (31) and the fixed upright post (31);
s5, finally, sleeving the reinforcing body (81) of the reinforcing member (8) at the connecting position of the first connecting piece (6) and the second connecting piece (7) of the adjacent upright post (31) to enable the reinforcing member (8) and the first connecting piece (6) and the second connecting piece (7) of the adjacent upright post (31) to form clamping connection.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115198774A (en) * | 2022-08-09 | 2022-10-18 | 广东中岩岩土工程技术开发有限公司 | Building basement foundation pit slope supporting structure and construction method |
| CN115288153A (en) * | 2022-08-17 | 2022-11-04 | 北京市市政一建设工程有限责任公司 | Underground passage deep foundation pit excavation supporting structure and construction process thereof |
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| CN115288153B (en) * | 2022-08-17 | 2023-12-12 | 北京市市政一建设工程有限责任公司 | Underground passage deep foundation pit excavation supporting structure and construction process thereof |
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| CN112921978B (en) | 2022-07-01 |
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